25315816 has 32 divisors (see below), whose sum is σ = 48911040. Its totient is φ = 12279168.

The previous prime is 25315781. The next prime is 25315817. The reversal of 25315816 is 61851352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25315817) 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, 38805 + ... + 39451.

It is an arithmetic number, because the mean of its divisors is an integer number (1528470).

Almost surely, 2^25315816 is an apocalyptic number.

It is an amenable number.

25315816 is a deficient number, since it is larger than the sum of its proper divisors (23595224).

25315816 is a wasteful number, since it uses less digits than its factorization.

25315816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 789 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 25315816 is about 5031.4824853119. The cubic root of 25315816 is about 293.6278939610.

The spelling of 25315816 in words is "twenty-five million, three hundred fifteen thousand, eight hundred sixteen".