51513165501 has 32 divisors (see below), whose sum is σ = 79140458496. Its totient is φ = 29194776000.

The previous prime is 51513165493. The next prime is 51513165521. The reversal of 51513165501 is 10556131515.

It is not a de Polignac number, because 51513165501 - 2³ = 51513165493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513165521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6105756 + ... + 6114186.

It is an arithmetic number, because the mean of its divisors is an integer number (2473139328).

Almost surely, 2^51513165501 is an apocalyptic number.

It is an amenable number.

51513165501 is a deficient number, since it is larger than the sum of its proper divisors (27627292995).

51513165501 is a wasteful number, since it uses less digits than its factorization.

51513165501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10793.

The product of its (nonzero) digits is 11250, while the sum is 33.

The spelling of 51513165501 in words is "fifty-one billion, five hundred thirteen million, one hundred sixty-five thousand, five hundred one".