51111010631 has 2 divisors, whose sum is σ = 51111010632. Its totient is φ = 51111010630.

The previous prime is 51111010603. The next prime is 51111010651. The reversal of 51111010631 is 13601011115.

51111010631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51111010651) can be obtained adding 51111010631 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51111010631 - 2⁶ = 51111010567 is a prime.

It is a super-2 number, since 2×51111010631² (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 (51111010651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555505315 + 25555505316.

It is an arithmetic number, because the mean of its divisors is an integer number (25555505316).

Almost surely, 2^51111010631 is an apocalyptic number.

51111010631 is a deficient number, since it is larger than the sum of its proper divisors (1).

51111010631 is an equidigital number, since it uses as much as digits as its factorization.

51111010631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 20.

Adding to 51111010631 its reverse (13601011115), we get a palindrome (64712021746).

The spelling of 51111010631 in words is "fifty-one billion, one hundred eleven million, ten thousand, six hundred thirty-one".