51001165 has 8 divisors (see below), whose sum is σ = 61300728. Its totient is φ = 40734720.

The previous prime is 51001163. The next prime is 51001213. The reversal of 51001165 is 56110015.

51001165 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 22410756 + 28590409 = 4734^2 + 5347^2 .

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

It is not a de Polignac number, because 51001165 - 2¹ = 51001163 is a prime.

It is a super-2 number, since 2×51001165² = 5202237662714450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51001163) by changing a digit.

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, 4752 + ... + 11161.

It is an arithmetic number, because the mean of its divisors is an integer number (7662591).

Almost surely, 2^51001165 is an apocalyptic number.

It is an amenable number.

51001165 is a deficient number, since it is larger than the sum of its proper divisors (10299563).

51001165 is a wasteful number, since it uses less digits than its factorization.

51001165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16559.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 51001165 is about 7141.5099943919. The cubic root of 51001165 is about 370.8458006441.

The spelling of 51001165 in words is "fifty-one million, one thousand, one hundred sixty-five".