51015112069 has 2 divisors, whose sum is σ = 51015112070. Its totient is φ = 51015112068.

The previous prime is 51015112063. The next prime is 51015112079. The reversal of 51015112069 is 96021151015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47006576100 + 4008535969 = 216810^2 + 63313^2 .

It is a cyclic number.

It is not a de Polignac number, because 51015112069 - 2⁷ = 51015111941 is a prime.

It is a super-2 number, since 2×51015112069² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51015112069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51015112063) 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, 25507556034 + 25507556035.

It is an arithmetic number, because the mean of its divisors is an integer number (25507556035).

Almost surely, 2^51015112069 is an apocalyptic number.

It is an amenable number.

51015112069 is a deficient number, since it is larger than the sum of its proper divisors (1).

51015112069 is an equidigital number, since it uses as much as digits as its factorization.

51015112069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 31.

The spelling of 51015112069 in words is "fifty-one billion, fifteen million, one hundred twelve thousand, sixty-nine".