25231313 has 4 divisors (see below), whose sum is σ = 25392180. Its totient is φ = 25070448.

The previous prime is 25231309. The next prime is 25231319. The reversal of 25231313 is 31313252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7524049 + 17707264 = 2743^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 25231313 - 2² = 25231309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25231319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80198 + ... + 80511.

It is an arithmetic number, because the mean of its divisors is an integer number (6348045).

Almost surely, 2^25231313 is an apocalyptic number.

It is an amenable number.

25231313 is a deficient number, since it is larger than the sum of its proper divisors (160867).

25231313 is a wasteful number, since it uses less digits than its factorization.

25231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160866.

The product of its digits is 540, while the sum is 20.

The square root of 25231313 is about 5023.0780404051. The cubic root of 25231313 is about 293.3008244219.

Adding to 25231313 its reverse (31313252), we get a palindrome (56544565).

The spelling of 25231313 in words is "twenty-five million, two hundred thirty-one thousand, three hundred thirteen".