25311998 has 4 divisors (see below), whose sum is σ = 37968000. Its totient is φ = 12655998.

The previous prime is 25311967. The next prime is 25312019. The reversal of 25311998 is 89911352.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327998 + ... + 6328001.

It is an arithmetic number, because the mean of its divisors is an integer number (9492000).

Almost surely, 2^25311998 is an apocalyptic number.

25311998 is a deficient number, since it is larger than the sum of its proper divisors (12656002).

25311998 is a wasteful number, since it uses less digits than its factorization.

25311998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12656001.

The product of its digits is 19440, while the sum is 38.

The square root of 25311998 is about 5031.1030599661. The cubic root of 25311998 is about 293.6131320738.

The spelling of 25311998 in words is "twenty-five million, three hundred eleven thousand, nine hundred ninety-eight".