21512500500325 has 12 divisors (see below), whose sum is σ = 26708392754848. Its totient is φ = 17188779668400.

The previous prime is 21512500500259. The next prime is 21512500500401. The reversal of 21512500500325 is 52300500521512.

It is not a de Polignac number, because 21512500500325 - 2²⁹ = 21511963629413 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 530497617 + ... + 530538166.

Almost surely, 2^{21512500500325} is an apocalyptic number.

21512500500325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21512500500325 is a deficient number, since it is larger than the sum of its proper divisors (5195892254523).

21512500500325 is a wasteful number, since it uses less digits than its factorization.

21512500500325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061036604 (or 1061036599 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 21512500500325 in words is "twenty-one trillion, five hundred twelve billion, five hundred million, five hundred thousand, three hundred twenty-five".