52209409 has 4 divisors (see below), whose sum is σ = 59667904. Its totient is φ = 44750916.

The previous prime is 52209401. The next prime is 52209413. The reversal of 52209409 is 90490225.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 52209409 - 2³ = 52209401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52209401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3729237 + ... + 3729250.

It is an arithmetic number, because the mean of its divisors is an integer number (14916976).

Almost surely, 2^52209409 is an apocalyptic number.

It is an amenable number.

52209409 is a deficient number, since it is larger than the sum of its proper divisors (7458495).

52209409 is an equidigital number, since it uses as much as digits as its factorization.

52209409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458494.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 52209409 is about 7225.6078637025. The cubic root of 52209409 is about 373.7514839820.

The spelling of 52209409 in words is "fifty-two million, two hundred nine thousand, four hundred nine".