51712860 has 24 divisors (see below), whose sum is σ = 144796176. Its totient is φ = 13790080.

The previous prime is 51712799. The next prime is 51712877. The reversal of 51712860 is 6821715.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430881 + ... + 431000.

It is an arithmetic number, because the mean of its divisors is an integer number (6033174).

Almost surely, 2^51712860 is an apocalyptic number.

It is an amenable number.

51712860 is an abundant number, since it is smaller than the sum of its proper divisors (93083316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51712860 is a wasteful number, since it uses less digits than its factorization.

51712860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861893 (or 861891 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 51712860 is about 7191.1654131997. The cubic root of 51712860 is about 372.5628259120.

The spelling of 51712860 in words is "fifty-one million, seven hundred twelve thousand, eight hundred sixty".