51131495927 has 2 divisors, whose sum is σ = 51131495928. Its totient is φ = 51131495926.

The previous prime is 51131495887. The next prime is 51131495941. The reversal of 51131495927 is 72959413115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51131495927 - 2¹⁰ = 51131494903 is a prime.

It is a super-2 number, since 2×51131495927² (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 (51131495027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25565747963 + 25565747964.

It is an arithmetic number, because the mean of its divisors is an integer number (25565747964).

Almost surely, 2^51131495927 is an apocalyptic number.

51131495927 is a deficient number, since it is larger than the sum of its proper divisors (1).

51131495927 is an equidigital number, since it uses as much as digits as its factorization.

51131495927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The spelling of 51131495927 in words is "fifty-one billion, one hundred thirty-one million, four hundred ninety-five thousand, nine hundred twenty-seven".