51000000015 has 16 divisors (see below), whose sum is σ = 85147826688. Its totient is φ = 26017391136.

The previous prime is 50999999957. The next prime is 51000000041.

51000000015 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51000000015 - 2⁶ = 50999999951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73912699 + ... + 73913388.

It is an arithmetic number, because the mean of its divisors is an integer number (5321739168).

Almost surely, 2^51000000015 is an apocalyptic number.

51000000015 is a deficient number, since it is larger than the sum of its proper divisors (34147826673).

51000000015 is a wasteful number, since it uses less digits than its factorization.

51000000015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147826118.

The product of its (nonzero) digits is 25, while the sum is 12.

It can be divided in two parts, 510000000 and 15, that added together give a palindrome (510000015).

The spelling of 51000000015 in words is "fifty-one billion, fifteen", and thus it is an aban number and an uban number.