51530331187 has 2 divisors, whose sum is σ = 51530331188. Its totient is φ = 51530331186.

The previous prime is 51530331089. The next prime is 51530331221. The reversal of 51530331187 is 78113303515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51530331187 - 2³⁵ = 17170592819 is a prime.

It is not a weakly prime, because it can be changed into another prime (51530331487) 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, 25765165593 + 25765165594.

It is an arithmetic number, because the mean of its divisors is an integer number (25765165594).

Almost surely, 2^51530331187 is an apocalyptic number.

51530331187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51530331187 is an equidigital number, since it uses as much as digits as its factorization.

51530331187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 51530331187 in words is "fifty-one billion, five hundred thirty million, three hundred thirty-one thousand, one hundred eighty-seven".