25155913 has 4 divisors (see below), whose sum is σ = 25266960. Its totient is φ = 25044868.

The previous prime is 25155899. The next prime is 25155917. The reversal of 25155913 is 31955152.

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 25155913 - 2⁵ = 25155881 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25155917) 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, 55183 + ... + 55636.

It is an arithmetic number, because the mean of its divisors is an integer number (6316740).

Almost surely, 2^25155913 is an apocalyptic number.

It is an amenable number.

25155913 is a deficient number, since it is larger than the sum of its proper divisors (111047).

25155913 is a wasteful number, since it uses less digits than its factorization.

25155913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111046.

The product of its digits is 6750, while the sum is 31.

The square root of 25155913 is about 5015.5670666436. The cubic root of 25155913 is about 293.0083710484.

The spelling of 25155913 in words is "twenty-five million, one hundred fifty-five thousand, nine hundred thirteen".