52104209 has 4 divisors (see below), whose sum is σ = 52152804. Its totient is φ = 52055616.

The previous prime is 52104193. The next prime is 52104233. The reversal of 52104209 is 90240125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33640000 + 18464209 = 5800^2 + 4297^2 .

It is a cyclic number.

It is not a de Polignac number, because 52104209 - 2⁴ = 52104193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52104259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22652 + ... + 24845.

It is an arithmetic number, because the mean of its divisors is an integer number (13038201).

Almost surely, 2^52104209 is an apocalyptic number.

It is an amenable number.

52104209 is a deficient number, since it is larger than the sum of its proper divisors (48595).

52104209 is a wasteful number, since it uses less digits than its factorization.

52104209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48594.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 52104209 is about 7218.3245285869. The cubic root of 52104209 is about 373.5002834480.

The spelling of 52104209 in words is "fifty-two million, one hundred four thousand, two hundred nine".