25256595231 has 48 divisors (see below), whose sum is σ = 43793510400. Its totient is φ = 14343675696.

The previous prime is 25256595209. The next prime is 25256595263. The reversal of 25256595231 is 13259565252.

It is a happy number.

25256595231 is a `hidden beast` number, since 2 + 5 + 2 + 56 + 595 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 25256595231 - 2⁶ = 25256595167 is a prime.

It is a super-3 number, since 3×25256595231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25256595431) 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 47 ways as a sum of consecutive naturals, for example, 157090 + ... + 274208.

It is an arithmetic number, because the mean of its divisors is an integer number (912364800).

Almost surely, 2^25256595231 is an apocalyptic number.

25256595231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25256595231 is a deficient number, since it is larger than the sum of its proper divisors (18536915169).

25256595231 is a wasteful number, since it uses less digits than its factorization.

25256595231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117305 (or 117292 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The spelling of 25256595231 in words is "twenty-five billion, two hundred fifty-six million, five hundred ninety-five thousand, two hundred thirty-one".