30315232220 has 96 divisors (see below), whose sum is σ = 79637986176. Its totient is φ = 9436953600.

The previous prime is 30315232219. The next prime is 30315232249. The reversal of 30315232220 is 2223251303.

It is a super-2 number, since 2×30315232220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25511 + ... + 247550.

It is an arithmetic number, because the mean of its divisors is an integer number (829562356).

Almost surely, 2^30315232220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30315232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39818993088).

30315232220 is an abundant number, since it is smaller than the sum of its proper divisors (49322753956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30315232220 is a wasteful number, since it uses less digits than its factorization.

30315232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273151 (or 273149 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 30315232220 its reverse (2223251303), we get a palindrome (32538483523).

The spelling of 30315232220 in words is "thirty billion, three hundred fifteen million, two hundred thirty-two thousand, two hundred twenty".