25339431 has 16 divisors (see below), whose sum is σ = 37560320. Its totient is φ = 15089760.

The previous prime is 25339393. The next prime is 25339453. The reversal of 25339431 is 13493352.

It is not a de Polignac number, because 25339431 - 2¹⁰ = 25338407 is a prime.

It is a super-2 number, since 2×25339431² = 1284173526807522, 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 (25339471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9271 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (2347520).

Almost surely, 2^25339431 is an apocalyptic number.

25339431 is a deficient number, since it is larger than the sum of its proper divisors (12220889).

25339431 is a wasteful number, since it uses less digits than its factorization.

25339431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21006.

The product of its digits is 9720, while the sum is 30.

The square root of 25339431 is about 5033.8286621616. The cubic root of 25339431 is about 293.7191658597.

The spelling of 25339431 in words is "twenty-five million, three hundred thirty-nine thousand, four hundred thirty-one".