25331313 has 16 divisors (see below), whose sum is σ = 40632320. Its totient is φ = 13712976.

The previous prime is 25331263. The next prime is 25331329. The reversal of 25331313 is 31313352.

It is not a de Polignac number, because 25331313 - 2⁶ = 25331249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25331313.

It is not an unprimeable number, because it can be changed into a prime (25331353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31345 + ... + 32142.

It is an arithmetic number, because the mean of its divisors is an integer number (2539520).

Almost surely, 2^25331313 is an apocalyptic number.

It is an amenable number.

25331313 is a deficient number, since it is larger than the sum of its proper divisors (15301007).

25331313 is a wasteful number, since it uses less digits than its factorization.

25331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63516.

The product of its digits is 810, while the sum is 21.

The square root of 25331313 is about 5033.0222530802. The cubic root of 25331313 is about 293.6877962147.

Adding to 25331313 its reverse (31313352), we get a palindrome (56644665).

The spelling of 25331313 in words is "twenty-five million, three hundred thirty-one thousand, three hundred thirteen".