51000125531 has 2 divisors, whose sum is σ = 51000125532. Its totient is φ = 51000125530.

The previous prime is 51000125467. The next prime is 51000125537. The reversal of 51000125531 is 13552100015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51000125531 - 2⁶ = 51000125467 is a prime.

It is a super-2 number, since 2×51000125531² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 51000125497 and 51000125506.

It is not a weakly prime, because it can be changed into another prime (51000125537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500062765 + 25500062766.

It is an arithmetic number, because the mean of its divisors is an integer number (25500062766).

Almost surely, 2^51000125531 is an apocalyptic number.

51000125531 is a deficient number, since it is larger than the sum of its proper divisors (1).

51000125531 is an equidigital number, since it uses as much as digits as its factorization.

51000125531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 51000125531 its reverse (13552100015), we get a palindrome (64552225546).

The spelling of 51000125531 in words is "fifty-one billion, one hundred twenty-five thousand, five hundred thirty-one".