25325521531 has 8 divisors (see below), whose sum is σ = 25920333824. Its totient is φ = 24730975080.

The previous prime is 25325521523. The next prime is 25325521549. The reversal of 25325521531 is 13512552352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25325521531 - 2³ = 25325521523 is a prime.

It is a super-2 number, since 2×25325521531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25325521931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133270 + ... + 261556.

It is an arithmetic number, because the mean of its divisors is an integer number (3240041728).

Almost surely, 2^25325521531 is an apocalyptic number.

25325521531 is a deficient number, since it is larger than the sum of its proper divisors (594812293).

25325521531 is a wasteful number, since it uses less digits than its factorization.

25325521531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132921.

The product of its digits is 45000, while the sum is 34.

The spelling of 25325521531 in words is "twenty-five billion, three hundred twenty-five million, five hundred twenty-one thousand, five hundred thirty-one".