51111010651 has 2 divisors, whose sum is σ = 51111010652. Its totient is φ = 51111010650.

The previous prime is 51111010631. The next prime is 51111010747. The reversal of 51111010651 is 15601011115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51111010651 is a prime.

It is a super-2 number, since 2×51111010651² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51111010631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555505325 + 25555505326.

It is an arithmetic number, because the mean of its divisors is an integer number (25555505326).

Almost surely, 2^51111010651 is an apocalyptic number.

51111010651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51111010651 is an equidigital number, since it uses as much as digits as its factorization.

51111010651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 22.

Adding to 51111010651 its reverse (15601011115), we get a palindrome (66712021766).

The spelling of 51111010651 in words is "fifty-one billion, one hundred eleven million, ten thousand, six hundred fifty-one".