51170975831 has 2 divisors, whose sum is σ = 51170975832. Its totient is φ = 51170975830.

The previous prime is 51170975797. The next prime is 51170975857. The reversal of 51170975831 is 13857907115.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51170975831 is a prime.

It is a super-2 number, since 2×51170975831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51170975431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25585487915 + 25585487916.

It is an arithmetic number, because the mean of its divisors is an integer number (25585487916).

Almost surely, 2^51170975831 is an apocalyptic number.

51170975831 is a deficient number, since it is larger than the sum of its proper divisors (1).

51170975831 is an equidigital number, since it uses as much as digits as its factorization.

51170975831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 47.

The spelling of 51170975831 in words is "fifty-one billion, one hundred seventy million, nine hundred seventy-five thousand, eight hundred thirty-one".