51988560 has 160 divisors (see below), whose sum is σ = 182904960. Its totient is φ = 12109824.

The previous prime is 51988537. The next prime is 51988613. The reversal of 51988560 is 6588915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58842 + ... + 59718.

It is an arithmetic number, because the mean of its divisors is an integer number (1143156).

Almost surely, 2^51988560 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 51988560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91452480).

51988560 is an abundant number, since it is smaller than the sum of its proper divisors (130916400).

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

51988560 is a wasteful number, since it uses less digits than its factorization.

51988560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 51988560 is about 7210.3092860154. The cubic root of 51988560 is about 373.2237419257.

The spelling of 51988560 in words is "fifty-one million, nine hundred eighty-eight thousand, five hundred sixty".