51731361180 has 144 divisors (see below), whose sum is σ = 171295313280. Its totient is φ = 13068952128.

The previous prime is 51731361169. The next prime is 51731361181. The reversal of 51731361180 is 8116313715.

51731361180 is a `hidden beast` number, since 5 + 1 + 7 + 31 + 3 + 611 + 8 + 0 = 666.

It is a super-2 number, since 2×51731361180² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51731361181) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187774 + ... + 372453.

Almost surely, 2^51731361180 is an apocalyptic number.

It is an amenable number.

51731361180 is an abundant number, since it is smaller than the sum of its proper divisors (119563952100).

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

51731361180 is a wasteful number, since it uses less digits than its factorization.

51731361180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560270 (or 560256 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

Adding to 51731361180 its reverse (8116313715), we get a palindrome (59847674895).

The spelling of 51731361180 in words is "fifty-one billion, seven hundred thirty-one million, three hundred sixty-one thousand, one hundred eighty".