51707936 has 60 divisors (see below), whose sum is σ = 118936062. Its totient is φ = 22127616.

The previous prime is 51707893. The next prime is 51707939. The reversal of 51707936 is 63970715.

It can be written as a sum of positive squares in only one way, i.e., 47059600 + 4648336 = 6860^2 + 2156^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51707936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51707939) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 76496 + ... + 77168.

Almost surely, 2^51707936 is an apocalyptic number.

51707936 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51707936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59468031).

51707936 is an abundant number, since it is smaller than the sum of its proper divisors (67228126).

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

51707936 is an frugal number, since it uses more digits than its factorization.

51707936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 51707936 is about 7190.8230405149. The cubic root of 51707936 is about 372.5510006292.

The spelling of 51707936 in words is "fifty-one million, seven hundred seven thousand, nine hundred thirty-six".