21525152512 has 36 divisors (see below), whose sum is σ = 43048957896. Its totient is φ = 10741852160.

The previous prime is 21525152507. The next prime is 21525152513.

21525152512 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21525152513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52683 + ... + 214069.

It is an arithmetic number, because the mean of its divisors is an integer number (1195804386).

Almost surely, 2^21525152512 is an apocalyptic number.

It is an amenable number.

21525152512 is a deficient number, since it is larger than the sum of its proper divisors (21523805384).

21525152512 is an equidigital number, since it uses as much as digits as its factorization.

21525152512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161924 (or 161910 counting only the distinct ones).

The product of its digits is 10000, while the sum is 31.

The spelling of 21525152512 in words is "twenty-one billion, five hundred twenty-five million, one hundred fifty-two thousand, five hundred twelve".