25312431 has 8 divisors (see below), whose sum is σ = 33782400. Its totient is φ = 16858712.

The previous prime is 25312387. The next prime is 25312451. The reversal of 25312431 is 13421352.

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 25312431 - 2⁹ = 25311919 is a prime.

It is a super-2 number, since 2×25312431² = 1281438326259522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25312398 and 25312407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25312451) 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, 220 + ... + 7118.

It is an arithmetic number, because the mean of its divisors is an integer number (4222800).

Almost surely, 2^25312431 is an apocalyptic number.

25312431 is a deficient number, since it is larger than the sum of its proper divisors (8469969).

25312431 is a wasteful number, since it uses less digits than its factorization.

25312431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8125.

The product of its digits is 720, while the sum is 21.

The square root of 25312431 is about 5031.1460920947. The cubic root of 25312431 is about 293.6148062964.

Adding to 25312431 its reverse (13421352), we get a palindrome (38733783).

The spelling of 25312431 in words is "twenty-five million, three hundred twelve thousand, four hundred thirty-one".