51512255131 has 2 divisors, whose sum is σ = 51512255132. Its totient is φ = 51512255130.

The previous prime is 51512255129. The next prime is 51512255153. The reversal of 51512255131 is 13155221515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51512255131 - 2¹ = 51512255129 is a prime.

It is a super-2 number, since 2×51512255131² (a number of 22 digits) contains 22 as substring.

Together with 51512255129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51512255093 and 51512255102.

It is not a weakly prime, because it can be changed into another prime (51512259131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756127565 + 25756127566.

It is an arithmetic number, because the mean of its divisors is an integer number (25756127566).

Almost surely, 2^51512255131 is an apocalyptic number.

51512255131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51512255131 is an equidigital number, since it uses as much as digits as its factorization.

51512255131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7500, while the sum is 31.

Adding to 51512255131 its reverse (13155221515), we get a palindrome (64667476646).

The spelling of 51512255131 in words is "fifty-one billion, five hundred twelve million, two hundred fifty-five thousand, one hundred thirty-one".