51513100239 has 48 divisors (see below), whose sum is σ = 74898065664. Its totient is φ = 31382830080.

The previous prime is 51513100237. The next prime is 51513100259. The reversal of 51513100239 is 93200131515.

It is not a de Polignac number, because 51513100239 - 2¹ = 51513100237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513100237) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19459614 + ... + 19462260.

It is an arithmetic number, because the mean of its divisors is an integer number (1560376368).

Almost surely, 2^51513100239 is an apocalyptic number.

51513100239 is a deficient number, since it is larger than the sum of its proper divisors (23384965425).

51513100239 is a wasteful number, since it uses less digits than its factorization.

51513100239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976 (or 2935 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The spelling of 51513100239 in words is "fifty-one billion, five hundred thirteen million, one hundred thousand, two hundred thirty-nine".