51050715509 has 4 divisors (see below), whose sum is σ = 51292662240. Its totient is φ = 50808768780.

The previous prime is 51050715481. The next prime is 51050715511. The reversal of 51050715509 is 90551705015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51050715509 - 2¹⁶ = 51050649973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51050765509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120973049 + ... + 120973470.

It is an arithmetic number, because the mean of its divisors is an integer number (12823165560).

Almost surely, 2^51050715509 is an apocalyptic number.

It is an amenable number.

51050715509 is a deficient number, since it is larger than the sum of its proper divisors (241946731).

51050715509 is a wasteful number, since it uses less digits than its factorization.

51050715509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241946730.

The product of its (nonzero) digits is 39375, while the sum is 38.

The spelling of 51050715509 in words is "fifty-one billion, fifty million, seven hundred fifteen thousand, five hundred nine".