21160324652525 has 12 divisors (see below), whose sum is σ = 26238864290100. Its totient is φ = 16928219902080.

The previous prime is 21160324652507. The next prime is 21160324652549. The reversal of 21160324652525 is 52525642306112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3239377229929 + 17920947422596 = 1799827^2 + 4233314^2 .

It is not a de Polignac number, because 21160324652525 - 2²⁰ = 21160323603949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14692841 + ... + 16068609.

It is an arithmetic number, because the mean of its divisors is an integer number (2186572024175).

Almost surely, 2^{21160324652525} is an apocalyptic number.

21160324652525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21160324652525 is a deficient number, since it is larger than the sum of its proper divisors (5078539637575).

21160324652525 is a wasteful number, since it uses less digits than its factorization.

21160324652525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991008 (or 1991003 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

Adding to 21160324652525 its reverse (52525642306112), we get a palindrome (73685966958637).

The spelling of 21160324652525 in words is "twenty-one trillion, one hundred sixty billion, three hundred twenty-four million, six hundred fifty-two thousand, five hundred twenty-five".