51110317631 has 2 divisors, whose sum is σ = 51110317632. Its totient is φ = 51110317630.

The previous prime is 51110317619. The next prime is 51110317637. The reversal of 51110317631 is 13671301115.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51110317631 - 2²⁶ = 51043208767 is a prime.

It is a super-2 number, since 2×51110317631² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51110317594 and 51110317603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51110317637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555158815 + 25555158816.

It is an arithmetic number, because the mean of its divisors is an integer number (25555158816).

Almost surely, 2^51110317631 is an apocalyptic number.

51110317631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51110317631 is an equidigital number, since it uses as much as digits as its factorization.

51110317631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

Adding to 51110317631 its reverse (13671301115), we get a palindrome (64781618746).

The spelling of 51110317631 in words is "fifty-one billion, one hundred ten million, three hundred seventeen thousand, six hundred thirty-one".