Search a number
-
+
30102230221 = 723474493943
BaseRepresentation
bin11100000010001110…
…111001010011001101
32212200212122201212121
4130002032321103031
5443122132331341
621455003132541
72113650510100
oct340216712315
985625581777
1030102230221
1111847a19118
125a01214151
132ab9609a5b
141657c5a737
15bb2abe4d1
hex7023b94cd

30102230221 has 24 divisors (see below), whose sum is σ = 35204932800. Its totient is φ = 25663744512.

The previous prime is 30102230209. The next prime is 30102230239. The reversal of 30102230221 is 12203220103.

It is not a de Polignac number, because 30102230221 - 25 = 30102230189 is a prime.

It is a super-2 number, since 2×301022302212 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30102230195 and 30102230204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30102230251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7632376 + ... + 7636318.

It is an arithmetic number, because the mean of its divisors is an integer number (1466872200).

Almost surely, 230102230221 is an apocalyptic number.

It is an amenable number.

30102230221 is a deficient number, since it is larger than the sum of its proper divisors (5102702579).

30102230221 is a wasteful number, since it uses less digits than its factorization.

30102230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753 (or 4746 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30102230221 its reverse (12203220103), we get a palindrome (42305450324).

The spelling of 30102230221 in words is "thirty billion, one hundred two million, two hundred thirty thousand, two hundred twenty-one".

Divisors: 1 7 49 347 449 2429 3143 3943 17003 22001 27601 155803 193207 1090621 1368221 1770407 7634347 9577547 12392849 67042829 86749943 614331229 4300318603 30102230221