51516165 has 8 divisors (see below), whose sum is σ = 82425888. Its totient is φ = 27475280.

The previous prime is 51516097. The next prime is 51516167. The reversal of 51516165 is 56161515.

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

It is not a de Polignac number, because 51516165 - 2⁷ = 51516037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516167) 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, 1717191 + ... + 1717220.

It is an arithmetic number, because the mean of its divisors is an integer number (10303236).

Almost surely, 2^51516165 is an apocalyptic number.

It is an amenable number.

51516165 is a deficient number, since it is larger than the sum of its proper divisors (30909723).

51516165 is a wasteful number, since it uses less digits than its factorization.

51516165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434419.

The product of its digits is 4500, while the sum is 30.

The square root of 51516165 is about 7177.4762277558. The cubic root of 51516165 is about 372.0898658482.

It can be divided in two parts, 51516 and 165, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 51516165 in words is "fifty-one million, five hundred sixteen thousand, one hundred sixty-five".