2561531231252 has 24 divisors (see below), whose sum is σ = 5128998852096. Its totient is φ = 1096527015648.

The previous prime is 2561531231239. The next prime is 2561531231267. The reversal of 2561531231252 is 2521321351652.

It is a super-2 number, since 2×2561531231252² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52978883 + ... + 53027210.

It is an arithmetic number, because the mean of its divisors is an integer number (213708285504).

Almost surely, 2^{2561531231252} is an apocalyptic number.

It is an amenable number.

2561531231252 is an abundant number, since it is smaller than the sum of its proper divisors (2567467620844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561531231252 is a wasteful number, since it uses less digits than its factorization.

2561531231252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106006967 (or 106006965 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The spelling of 2561531231252 in words is "two trillion, five hundred sixty-one billion, five hundred thirty-one million, two hundred thirty-one thousand, two hundred fifty-two".