25591313 has 4 divisors (see below), whose sum is σ = 27917808. Its totient is φ = 23264820.

The previous prime is 25591303. The next prime is 25591333. The reversal of 25591313 is 31319552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25591313 - 2⁸ = 25591057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25591303) 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, 1163231 + ... + 1163252.

It is an arithmetic number, because the mean of its divisors is an integer number (6979452).

Almost surely, 2^25591313 is an apocalyptic number.

It is an amenable number.

25591313 is a deficient number, since it is larger than the sum of its proper divisors (2326495).

25591313 is a wasteful number, since it uses less digits than its factorization.

25591313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326494.

The product of its digits is 4050, while the sum is 29.

The square root of 25591313 is about 5058.7857238669. The cubic root of 25591313 is about 294.6891794722.

The spelling of 25591313 in words is "twenty-five million, five hundred ninety-one thousand, three hundred thirteen".