51110005091 has 2 divisors, whose sum is σ = 51110005092. Its totient is φ = 51110005090.

The previous prime is 51110005027. The next prime is 51110005097. The reversal of 51110005091 is 19050001115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51110005091 - 2⁶ = 51110005027 is a prime.

It is a super-2 number, since 2×51110005091² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51110005097) 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, 25555002545 + 25555002546.

It is an arithmetic number, because the mean of its divisors is an integer number (25555002546).

Almost surely, 2^51110005091 is an apocalyptic number.

51110005091 is a deficient number, since it is larger than the sum of its proper divisors (1).

51110005091 is an equidigital number, since it uses as much as digits as its factorization.

51110005091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 23.

The spelling of 51110005091 in words is "fifty-one billion, one hundred ten million, five thousand, ninety-one".