51031872631 has 2 divisors, whose sum is σ = 51031872632. Its totient is φ = 51031872630.

The previous prime is 51031872583. The next prime is 51031872643. The reversal of 51031872631 is 13627813015.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51031872631 - 2⁷ = 51031872503 is a prime.

It is a super-3 number, since 3×51031872631³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51031882631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25515936315 + 25515936316.

It is an arithmetic number, because the mean of its divisors is an integer number (25515936316).

Almost surely, 2^51031872631 is an apocalyptic number.

51031872631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51031872631 is an equidigital number, since it uses as much as digits as its factorization.

51031872631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 51031872631 in words is "fifty-one billion, thirty-one million, eight hundred seventy-two thousand, six hundred thirty-one".