51163467731 has 4 divisors (see below), whose sum is σ = 53387966352. Its totient is φ = 48938969112.

The previous prime is 51163467713. The next prime is 51163467739. The reversal of 51163467731 is 13776436115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51163467731 - 2²² = 51159273427 is a prime.

It is a super-2 number, since 2×51163467731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51163467739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112249276 + ... + 1112249321.

It is an arithmetic number, because the mean of its divisors is an integer number (13346991588).

Almost surely, 2^51163467731 is an apocalyptic number.

51163467731 is a deficient number, since it is larger than the sum of its proper divisors (2224498621).

51163467731 is a wasteful number, since it uses less digits than its factorization.

51163467731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224498620.

The product of its digits is 317520, while the sum is 44.

The spelling of 51163467731 in words is "fifty-one billion, one hundred sixty-three million, four hundred sixty-seven thousand, seven hundred thirty-one".