51551000131 has 2 divisors, whose sum is σ = 51551000132. Its totient is φ = 51551000130.

The previous prime is 51551000129. The next prime is 51551000161. The reversal of 51551000131 is 13100015515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51551000131 - 2¹ = 51551000129 is a prime.

It is a super-2 number, since 2×51551000131² (a number of 22 digits) contains 22 as substring.

Together with 51551000129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51551000161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775500065 + 25775500066.

It is an arithmetic number, because the mean of its divisors is an integer number (25775500066).

Almost surely, 2^51551000131 is an apocalyptic number.

51551000131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51551000131 is an equidigital number, since it uses as much as digits as its factorization.

51551000131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375, while the sum is 22.

Adding to 51551000131 its reverse (13100015515), we get a palindrome (64651015646).

The spelling of 51551000131 in words is "fifty-one billion, five hundred fifty-one million, one hundred thirty-one", and thus it is an aban number.