25257631431 has 8 divisors (see below), whose sum is σ = 34498228464. Its totient is φ = 16427727680.

The previous prime is 25257631417. The next prime is 25257631453. The reversal of 25257631431 is 13413675252.

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 25257631431 - 2⁶ = 25257631367 is a prime.

It is a super-2 number, since 2×25257631431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25257631431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25257632431) 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, 102673176 + ... + 102673421.

It is an arithmetic number, because the mean of its divisors is an integer number (4312278558).

Almost surely, 2^25257631431 is an apocalyptic number.

25257631431 is a deficient number, since it is larger than the sum of its proper divisors (9240597033).

25257631431 is a wasteful number, since it uses less digits than its factorization.

25257631431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205346641.

The product of its digits is 151200, while the sum is 39.

The spelling of 25257631431 in words is "twenty-five billion, two hundred fifty-seven million, six hundred thirty-one thousand, four hundred thirty-one".