25315320 has 32 divisors (see below), whose sum is σ = 75946320. Its totient is φ = 6750720.

The previous prime is 25315319. The next prime is 25315333. The reversal of 25315320 is 2351352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105361 + ... + 105600.

Almost surely, 2^25315320 is an apocalyptic number.

25315320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25315320 is an abundant number, since it is smaller than the sum of its proper divisors (50631000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25315320 is a wasteful number, since it uses less digits than its factorization.

25315320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210975 (or 210971 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 25315320 is about 5031.4331954226. The cubic root of 25315320 is about 293.6259763141.

Adding to 25315320 its reverse (2351352), we get a palindrome (27666672).

The spelling of 25315320 in words is "twenty-five million, three hundred fifteen thousand, three hundred twenty".