25252505531 has 16 divisors (see below), whose sum is σ = 27697118208. Its totient is φ = 22832863200.

The previous prime is 25252505521. The next prime is 25252505549. The reversal of 25252505531 is 13550525252.

It is a cyclic number.

It is not a de Polignac number, because 25252505531 - 2²² = 25248311227 is a prime.

It is a super-2 number, since 2×25252505531² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25252505491 and 25252505500.

It is not an unprimeable number, because it can be changed into a prime (25252505521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4971365 + ... + 4976441.

It is an arithmetic number, because the mean of its divisors is an integer number (1731069888).

Almost surely, 2^25252505531 is an apocalyptic number.

25252505531 is a deficient number, since it is larger than the sum of its proper divisors (2444612677).

25252505531 is a wasteful number, since it uses less digits than its factorization.

25252505531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442.

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 25252505531 in words is "twenty-five billion, two hundred fifty-two million, five hundred five thousand, five hundred thirty-one".