51236165 has 8 divisors (see below), whose sum is σ = 61875960. Its totient is φ = 40727232.

The previous prime is 51236153. The next prime is 51236191. The reversal of 51236165 is 56163215.

51236165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 70756 + 51165409 = 266^2 + 7153^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51236165 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31850 + ... + 33419.

It is an arithmetic number, because the mean of its divisors is an integer number (7734495).

Almost surely, 2^51236165 is an apocalyptic number.

It is an amenable number.

51236165 is a deficient number, since it is larger than the sum of its proper divisors (10639795).

51236165 is a wasteful number, since it uses less digits than its factorization.

51236165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65431.

The product of its digits is 5400, while the sum is 29.

The square root of 51236165 is about 7157.9441881032. The cubic root of 51236165 is about 371.4145147893.

The spelling of 51236165 in words is "fifty-one million, two hundred thirty-six thousand, one hundred sixty-five".