51521281160 has 16 divisors (see below), whose sum is σ = 115922882700. Its totient is φ = 20608512448.

The previous prime is 51521281157. The next prime is 51521281181. The reversal of 51521281160 is 6118212515.

It can be written as a sum of positive squares in 2 ways, for example, as 49471546084 + 2049735076 = 222422^2 + 45274^2 .

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, 644015975 + ... + 644016054.

Almost surely, 2^51521281160 is an apocalyptic number.

It is an amenable number.

51521281160 is an abundant number, since it is smaller than the sum of its proper divisors (64401601540).

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

51521281160 is a wasteful number, since it uses less digits than its factorization.

51521281160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288032040 (or 1288032036 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 32.

Adding to 51521281160 its reverse (6118212515), we get a palindrome (57639493675).

The spelling of 51521281160 in words is "fifty-one billion, five hundred twenty-one million, two hundred eighty-one thousand, one hundred sixty".