51512255269 has 2 divisors, whose sum is σ = 51512255270. Its totient is φ = 51512255268.

The previous prime is 51512255239. The next prime is 51512255297. The reversal of 51512255269 is 96255221515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37878890625 + 13633364644 = 194625^2 + 116762^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51512255269 is a prime.

It is a super-2 number, since 2×51512255269² (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 (51512255209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756127634 + 25756127635.

It is an arithmetic number, because the mean of its divisors is an integer number (25756127635).

Almost surely, 2^51512255269 is an apocalyptic number.

It is an amenable number.

51512255269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51512255269 is an equidigital number, since it uses as much as digits as its factorization.

51512255269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270000, while the sum is 43.

The spelling of 51512255269 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-five thousand, two hundred sixty-nine".