25431916 has 24 divisors (see below), whose sum is σ = 45511200. Its totient is φ = 12432000.

The previous prime is 25431911. The next prime is 25431941. The reversal of 25431916 is 61913452.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25431911) 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 7 ways as a sum of consecutive naturals, for example, 42016 + ... + 42616.

It is an arithmetic number, because the mean of its divisors is an integer number (1896300).

Almost surely, 2^25431916 is an apocalyptic number.

It is an amenable number.

25431916 is a deficient number, since it is larger than the sum of its proper divisors (20079284).

25431916 is a wasteful number, since it uses less digits than its factorization.

25431916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 823 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 25431916 is about 5043.0066428669. The cubic root of 25431916 is about 294.0760751502.

The spelling of 25431916 in words is "twenty-five million, four hundred thirty-one thousand, nine hundred sixteen".