25256528331 has 8 divisors (see below), whose sum is σ = 33686384784. Its totient is φ = 16832178720.

The previous prime is 25256528317. The next prime is 25256528333. The reversal of 25256528331 is 13382565252.

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

It is not a de Polignac number, because 25256528331 - 2¹⁹ = 25256004043 is a prime.

It is a super-2 number, since 2×25256528331² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25256528333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365996 + ... + 1384361.

It is an arithmetic number, because the mean of its divisors is an integer number (4210798098).

Almost surely, 2^25256528331 is an apocalyptic number.

25256528331 is a deficient number, since it is larger than the sum of its proper divisors (8429856453).

25256528331 is a wasteful number, since it uses less digits than its factorization.

25256528331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753421.

The product of its digits is 432000, while the sum is 42.

The spelling of 25256528331 in words is "twenty-five billion, two hundred fifty-six million, five hundred twenty-eight thousand, three hundred thirty-one".