51615165 has 32 divisors (see below), whose sum is σ = 96399360. Its totient is φ = 23091264.

The previous prime is 51615149. The next prime is 51615241. The reversal of 51615165 is 56151615.

It is not a de Polignac number, because 51615165 - 2⁴ = 51615149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295 + ... + 10164.

It is an arithmetic number, because the mean of its divisors is an integer number (3012480).

Almost surely, 2^51615165 is an apocalyptic number.

It is an amenable number.

51615165 is a deficient number, since it is larger than the sum of its proper divisors (44784195).

51615165 is a wasteful number, since it uses less digits than its factorization.

51615165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10521.

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

The square root of 51615165 is about 7184.3694921684. The cubic root of 51615165 is about 372.3280650300.

The spelling of 51615165 in words is "fifty-one million, six hundred fifteen thousand, one hundred sixty-five".