23215317525 has 24 divisors (see below), whose sum is σ = 42647399360. Its totient is φ = 12381502320.

The previous prime is 23215317497. The next prime is 23215317533. The reversal of 23215317525 is 52571351232.

23215317525 is a `hidden beast` number, since 2 + 32 + 1 + 531 + 75 + 25 = 666.

It is not a de Polignac number, because 23215317525 - 2²⁵ = 23181763093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23215317525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17195857 + ... + 17197206.

Almost surely, 2^23215317525 is an apocalyptic number.

23215317525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23215317525 is a deficient number, since it is larger than the sum of its proper divisors (19432081835).

23215317525 is a wasteful number, since it uses less digits than its factorization.

23215317525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34393082 (or 34393071 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

Adding to 23215317525 its reverse (52571351232), we get a palindrome (75786668757).

The spelling of 23215317525 in words is "twenty-three billion, two hundred fifteen million, three hundred seventeen thousand, five hundred twenty-five".