51025002131 has 2 divisors, whose sum is σ = 51025002132. Its totient is φ = 51025002130.

The previous prime is 51025002103. The next prime is 51025002143. The reversal of 51025002131 is 13120052015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51025002131 is a prime.

It is a super-2 number, since 2×51025002131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51025002191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25512501065 + 25512501066.

It is an arithmetic number, because the mean of its divisors is an integer number (25512501066).

Almost surely, 2^51025002131 is an apocalyptic number.

51025002131 is a deficient number, since it is larger than the sum of its proper divisors (1).

51025002131 is an equidigital number, since it uses as much as digits as its factorization.

51025002131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 51025002131 its reverse (13120052015), we get a palindrome (64145054146).

The spelling of 51025002131 in words is "fifty-one billion, twenty-five million, two thousand, one hundred thirty-one".