51290973187 has 2 divisors, whose sum is σ = 51290973188. Its totient is φ = 51290973186.

The previous prime is 51290973179. The next prime is 51290973193. The reversal of 51290973187 is 78137909215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51290973187 - 2³ = 51290973179 is a prime.

It is not a weakly prime, because it can be changed into another prime (51290973127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25645486593 + 25645486594.

It is an arithmetic number, because the mean of its divisors is an integer number (25645486594).

Almost surely, 2^51290973187 is an apocalyptic number.

51290973187 is a deficient number, since it is larger than the sum of its proper divisors (1).

51290973187 is an equidigital number, since it uses as much as digits as its factorization.

51290973187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 52.

The spelling of 51290973187 in words is "fifty-one billion, two hundred ninety million, nine hundred seventy-three thousand, one hundred eighty-seven".