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23131023230 = 257378930897
BaseRepresentation
bin10101100010101101…
…110110011101111110
32012201001002201200002
4111202231312131332
5334333020220410
614343134034302
71446131311340
oct254255663576
965631081602
1023131023230
11989a950127
124596648992
1322482755c3
141196077290
15905a917a5
hex562b7677e

23131023230 has 32 divisors (see below), whose sum is σ = 48869873856. Its totient is φ = 7716294144.

The previous prime is 23131023211. The next prime is 23131023269. The reversal of 23131023230 is 3232013132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4462859 + ... + 4468038.

It is an arithmetic number, because the mean of its divisors is an integer number (1527183558).

Almost surely, 223131023230 is an apocalyptic number.

23131023230 is an abundant number, since it is smaller than the sum of its proper divisors (25738850626).

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

23131023230 is a wasteful number, since it uses less digits than its factorization.

23131023230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8930948.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 23131023230 its reverse (3232013132), we get a palindrome (26363036362).

The spelling of 23131023230 in words is "twenty-three billion, one hundred thirty-one million, twenty-three thousand, two hundred thirty".

Divisors: 1 2 5 7 10 14 35 37 70 74 185 259 370 518 1295 2590 8930897 17861794 44654485 62516279 89308970 125032558 312581395 330443189 625162790 660886378 1652215945 2313102323 3304431890 4626204646 11565511615 23131023230