21532504455525 has 48 divisors (see below), whose sum is σ = 40686582003200. Its totient is φ = 9843333312960.

The previous prime is 21532504455487. The next prime is 21532504455559. The reversal of 21532504455525 is 52555440523512.

It is not a de Polignac number, because 21532504455525 - 2⁸ = 21532504455269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101838366 + ... + 102049584.

Almost surely, 2^{21532504455525} is an apocalyptic number.

21532504455525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21532504455525 is a deficient number, since it is larger than the sum of its proper divisors (19154077547675).

21532504455525 is a wasteful number, since it uses less digits than its factorization.

21532504455525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405418 (or 405413 counting only the distinct ones).

The product of its (nonzero) digits is 6000000, while the sum is 48.

The spelling of 21532504455525 in words is "twenty-one trillion, five hundred thirty-two billion, five hundred four million, four hundred fifty-five thousand, five hundred twenty-five".