52502209 has 4 divisors (see below), whose sum is σ = 54312660. Its totient is φ = 50691760.

The previous prime is 52502207. The next prime is 52502221. The reversal of 52502209 is 90220525.

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 10705984 + 41796225 = 3272^2 + 6465^2 .

It is a cyclic number.

It is not a de Polignac number, because 52502209 - 2¹ = 52502207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52502201) 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, 905182 + ... + 905239.

It is an arithmetic number, because the mean of its divisors is an integer number (13578165).

Almost surely, 2^52502209 is an apocalyptic number.

It is an amenable number.

52502209 is a deficient number, since it is larger than the sum of its proper divisors (1810451).

52502209 is a wasteful number, since it uses less digits than its factorization.

52502209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810450.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 52502209 is about 7245.8408069733. The cubic root of 52502209 is about 374.4488710076.

The spelling of 52502209 in words is "fifty-two million, five hundred two thousand, two hundred nine".