51513117 has 16 divisors (see below), whose sum is σ = 69672960. Its totient is φ = 33851312.

The previous prime is 51513109. The next prime is 51513149. The reversal of 51513117 is 71131515.

It is a cyclic number.

It is not a de Polignac number, because 51513117 - 2³ = 51513109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51513167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122734 + ... + 123152.

It is an arithmetic number, because the mean of its divisors is an integer number (4354560).

Almost surely, 2^51513117 is an apocalyptic number.

It is an amenable number.

51513117 is a deficient number, since it is larger than the sum of its proper divisors (18159843).

51513117 is a wasteful number, since it uses less digits than its factorization.

51513117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its digits is 525, while the sum is 24.

The square root of 51513117 is about 7177.2638937133. The cubic root of 51513117 is about 372.0825273602.

The spelling of 51513117 in words is "fifty-one million, five hundred thirteen thousand, one hundred seventeen".