51161574231 has 6 divisors (see below), whose sum is σ = 73900051680. Its totient is φ = 34107716148.

The previous prime is 51161574229. The next prime is 51161574257. The reversal of 51161574231 is 13247516115.

51161574231 is a `hidden beast` number, since 5 + 1 + 1 + 61 + 574 + 23 + 1 = 666.

It is not a de Polignac number, because 51161574231 - 2¹ = 51161574229 is a prime.

It is a super-2 number, since 2×51161574231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51161574031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2842309671 + ... + 2842309688.

It is an arithmetic number, because the mean of its divisors is an integer number (12316675280).

Almost surely, 2^51161574231 is an apocalyptic number.

51161574231 is a deficient number, since it is larger than the sum of its proper divisors (22738477449).

51161574231 is a wasteful number, since it uses less digits than its factorization.

51161574231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5684619365 (or 5684619362 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The spelling of 51161574231 in words is "fifty-one billion, one hundred sixty-one million, five hundred seventy-four thousand, two hundred thirty-one".