25971431 has 8 divisors (see below), whose sum is σ = 26609040. Its totient is φ = 25339392.

The previous prime is 25971419. The next prime is 25971457. The reversal of 25971431 is 13417952.

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 25971431 - 2¹⁴ = 25955047 is a prime.

It is a super-2 number, since 2×25971431² = 1349030456375522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25971481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8960 + ... + 11498.

It is an arithmetic number, because the mean of its divisors is an integer number (3326130).

Almost surely, 2^25971431 is an apocalyptic number.

25971431 is a deficient number, since it is larger than the sum of its proper divisors (637609).

25971431 is a wasteful number, since it uses less digits than its factorization.

25971431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785.

The product of its digits is 7560, while the sum is 32.

The square root of 25971431 is about 5096.2173226816. The cubic root of 25971431 is about 296.1410599580.

The spelling of 25971431 in words is "twenty-five million, nine hundred seventy-one thousand, four hundred thirty-one".