51013631015 has 4 divisors (see below), whose sum is σ = 61216357224. Its totient is φ = 40810904808.

The previous prime is 51013631003. The next prime is 51013631017.

51013631015 is nontrivially palindromic in base 10.

51013631015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51013631015 - 2¹⁸ = 51013368871 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 (51013631017) 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, 5101363097 + ... + 5101363106.

It is an arithmetic number, because the mean of its divisors is an integer number (15304089306).

Almost surely, 2^51013631015 is an apocalyptic number.

51013631015 is a deficient number, since it is larger than the sum of its proper divisors (10202726209).

51013631015 is a wasteful number, since it uses less digits than its factorization.

51013631015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10202726208.

The product of its (nonzero) digits is 1350, while the sum is 26.

The spelling of 51013631015 in words is "fifty-one billion, thirteen million, six hundred thirty-one thousand, fifteen".