51804975 has 24 divisors (see below), whose sum is σ = 86450320. Its totient is φ = 27371520.

The previous prime is 51804971. The next prime is 51804989. The reversal of 51804975 is 57940815.

It is not a de Polignac number, because 51804975 - 2² = 51804971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51804971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5007 + ... + 11343.

Almost surely, 2^51804975 is an apocalyptic number.

51804975 is a deficient number, since it is larger than the sum of its proper divisors (34645345).

51804975 is a wasteful number, since it uses less digits than its factorization.

51804975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6459 (or 6454 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 51804975 is about 7197.5672973582. The cubic root of 51804975 is about 372.7839073983.

The spelling of 51804975 in words is "fifty-one million, eight hundred four thousand, nine hundred seventy-five".