52561234521 has 6 divisors (see below), whose sum is σ = 75921783210. Its totient is φ = 35040823008.

The previous prime is 52561234511. The next prime is 52561234553. The reversal of 52561234521 is 12543216525.

52561234521 is a `hidden beast` number, since 5 + 2 + 5 + 6 + 123 + 4 + 521 = 666.

52561234521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 48911745600 + 3649488921 = 221160^2 + 60411^2 .

It is not a de Polignac number, because 52561234521 - 2²³ = 52552845913 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52561234511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2920068576 + ... + 2920068593.

It is an arithmetic number, because the mean of its divisors is an integer number (12653630535).

Almost surely, 2^52561234521 is an apocalyptic number.

It is an amenable number.

52561234521 is a deficient number, since it is larger than the sum of its proper divisors (23360548689).

52561234521 is a wasteful number, since it uses less digits than its factorization.

52561234521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5840137175 (or 5840137172 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 52561234521 in words is "fifty-two billion, five hundred sixty-one million, two hundred thirty-four thousand, five hundred twenty-one".