52820165 has 16 divisors (see below), whose sum is σ = 66322800. Its totient is φ = 40330752.

The previous prime is 52820161. The next prime is 52820179. The reversal of 52820165 is 56102825.

It can be written as a sum of positive squares in 8 ways, for example, as 3694084 + 49126081 = 1922^2 + 7009^2 .

It is a cyclic number.

It is not a de Polignac number, because 52820165 - 2² = 52820161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52820161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10859 + ... + 14951.

It is an arithmetic number, because the mean of its divisors is an integer number (4145175).

Almost surely, 2^52820165 is an apocalyptic number.

It is an amenable number.

52820165 is a deficient number, since it is larger than the sum of its proper divisors (13502635).

52820165 is a wasteful number, since it uses less digits than its factorization.

52820165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 52820165 is about 7267.7482757729. The cubic root of 52820165 is about 375.2032438993.

The spelling of 52820165 in words is "fifty-two million, eight hundred twenty thousand, one hundred sixty-five".