50971615731 has 6 divisors (see below), whose sum is σ = 73625667180. Its totient is φ = 33981077148.

The previous prime is 50971615697. The next prime is 50971615757. The reversal of 50971615731 is 13751617905.

50971615731 is a `hidden beast` number, since 5 + 0 + 9 + 71 + 6 + 1 + 573 + 1 = 666.

It is not a de Polignac number, because 50971615731 - 2¹³ = 50971607539 is a prime.

It is a super-2 number, since 2×50971615731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50971615231) 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, 2831756421 + ... + 2831756438.

It is an arithmetic number, because the mean of its divisors is an integer number (12270944530).

Almost surely, 2^50971615731 is an apocalyptic number.

50971615731 is a deficient number, since it is larger than the sum of its proper divisors (22654051449).

50971615731 is a wasteful number, since it uses less digits than its factorization.

50971615731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663512865 (or 5663512862 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 45.

The spelling of 50971615731 in words is "fifty billion, nine hundred seventy-one million, six hundred fifteen thousand, seven hundred thirty-one".