51731213715 has 48 divisors (see below), whose sum is σ = 93658705920. Its totient is φ = 26364275520.

The previous prime is 51731213701. The next prime is 51731213767.

51731213715 is a `hidden beast` number, since 517 + 3 + 1 + 2 + 137 + 1 + 5 = 666.

51731213715 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51731213715 - 2⁷ = 51731213587 is a prime.

It is a super-2 number, since 2×51731213715² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51731213715.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1042846 + ... + 1091324.

It is an arithmetic number, because the mean of its divisors is an integer number (1951223040).

Almost surely, 2^51731213715 is an apocalyptic number.

51731213715 is a deficient number, since it is larger than the sum of its proper divisors (41927492205).

51731213715 is a wasteful number, since it uses less digits than its factorization.

51731213715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49544 (or 49541 counting only the distinct ones).

The product of its digits is 22050, while the sum is 36.

The spelling of 51731213715 in words is "fifty-one billion, seven hundred thirty-one million, two hundred thirteen thousand, seven hundred fifteen".