51100025 has 24 divisors (see below), whose sum is σ = 67183200. Its totient is φ = 38448000.

The previous prime is 51100019. The next prime is 51100033. The reversal of 51100025 is 52000115.

It is a de Polignac number, because none of the positive numbers 2^k-51100025 is a prime.

It is a super-2 number, since 2×51100025² = 5222425110001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51099982 and 51100009.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84725 + ... + 85325.

It is an arithmetic number, because the mean of its divisors is an integer number (2799300).

Almost surely, 2^51100025 is an apocalyptic number.

It is an amenable number.

51100025 is a deficient number, since it is larger than the sum of its proper divisors (16083175).

51100025 is a wasteful number, since it uses less digits than its factorization.

51100025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 51100025 is about 7148.4281489010. The cubic root of 51100025 is about 371.0852602268.

The spelling of 51100025 in words is "fifty-one million, one hundred thousand, twenty-five".