51504215159 has 2 divisors, whose sum is σ = 51504215160. Its totient is φ = 51504215158.

The previous prime is 51504215137. The next prime is 51504215201. The reversal of 51504215159 is 95151240515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51504215159 - 2²⁸ = 51235779703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51504215759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25752107579 + 25752107580.

It is an arithmetic number, because the mean of its divisors is an integer number (25752107580).

Almost surely, 2^51504215159 is an apocalyptic number.

51504215159 is a deficient number, since it is larger than the sum of its proper divisors (1).

51504215159 is an equidigital number, since it uses as much as digits as its factorization.

51504215159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 51504215159 in words is "fifty-one billion, five hundred four million, two hundred fifteen thousand, one hundred fifty-nine".