51708560 has 80 divisors (see below), whose sum is σ = 128603376. Its totient is φ = 19267584.

The previous prime is 51708521. The next prime is 51708593. The reversal of 51708560 is 6580715.

It can be written as a sum of positive squares in 8 ways, for example, as 3489424 + 48219136 = 1868^2 + 6944^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262382 + ... + 262578.

Almost surely, 2^51708560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51708560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64301688).

51708560 is an abundant number, since it is smaller than the sum of its proper divisors (76894816).

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

51708560 is a wasteful number, since it uses less digits than its factorization.

51708560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 51708560 is about 7190.8664290195. The cubic root of 51708560 is about 372.5524992444.

The spelling of 51708560 in words is "fifty-one million, seven hundred eight thousand, five hundred sixty".