51513511263 has 8 divisors (see below), whose sum is σ = 71670972288. Its totient is φ = 32849195544.

The previous prime is 51513511243. The next prime is 51513511267. The reversal of 51513511263 is 36211531515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51513511263 - 2²² = 51509316959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513511267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373286245 + ... + 373286382.

It is an arithmetic number, because the mean of its divisors is an integer number (8958871536).

Almost surely, 2^51513511263 is an apocalyptic number.

51513511263 is a deficient number, since it is larger than the sum of its proper divisors (20157461025).

51513511263 is a wasteful number, since it uses less digits than its factorization.

51513511263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746572653.

The product of its digits is 13500, while the sum is 33.

The spelling of 51513511263 in words is "fifty-one billion, five hundred thirteen million, five hundred eleven thousand, two hundred sixty-three".