51718580 has 12 divisors (see below), whose sum is σ = 108609060. Its totient is φ = 20687424.

The previous prime is 51718577. The next prime is 51718603. The reversal of 51718580 is 8581715.

It can be written as a sum of positive squares in 2 ways, for example, as 6210064 + 45508516 = 2492^2 + 6746^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51718580.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292945 + ... + 1292984.

It is an arithmetic number, because the mean of its divisors is an integer number (9050755).

Almost surely, 2^51718580 is an apocalyptic number.

It is an amenable number.

51718580 is an abundant number, since it is smaller than the sum of its proper divisors (56890480).

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

51718580 is a wasteful number, since it uses less digits than its factorization.

51718580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585938 (or 2585936 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 51718580 is about 7191.5631124256. The cubic root of 51718580 is about 372.5765618944.

The spelling of 51718580 in words is "fifty-one million, seven hundred eighteen thousand, five hundred eighty".