51013051615 has 4 divisors (see below), whose sum is σ = 61215661944. Its totient is φ = 40810441288.

The previous prime is 51013051613. The next prime is 51013051633. The reversal of 51013051615 is 51615031015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51013051615 - 2¹ = 51013051613 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 (51013051613) 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, 5101305157 + ... + 5101305166.

It is an arithmetic number, because the mean of its divisors is an integer number (15303915486).

Almost surely, 2^51013051615 is an apocalyptic number.

51013051615 is a deficient number, since it is larger than the sum of its proper divisors (10202610329).

51013051615 is a wasteful number, since it uses less digits than its factorization.

51013051615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202610328.

The product of its (nonzero) digits is 2250, while the sum is 28.

The spelling of 51013051615 in words is "fifty-one billion, thirteen million, fifty-one thousand, six hundred fifteen".