51513794235 has 16 divisors (see below), whose sum is σ = 91580078880. Its totient is φ = 27474023520.

The previous prime is 51513794231. The next prime is 51513794309. The reversal of 51513794235 is 53249731515.

51513794235 is a `hidden beast` number, since 5 + 151 + 3 + 79 + 423 + 5 = 666.

It is not a de Polignac number, because 51513794235 - 2² = 51513794231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51513794231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190791696 + ... + 190791965.

It is an arithmetic number, because the mean of its divisors is an integer number (5723754930).

Almost surely, 2^51513794235 is an apocalyptic number.

51513794235 is a deficient number, since it is larger than the sum of its proper divisors (40066284645).

51513794235 is a wasteful number, since it uses less digits than its factorization.

51513794235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381583675 (or 381583669 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The spelling of 51513794235 in words is "fifty-one billion, five hundred thirteen million, seven hundred ninety-four thousand, two hundred thirty-five".