252633209 has 4 divisors (see below), whose sum is σ = 267494004. Its totient is φ = 237772416.

The previous prime is 252633193. The next prime is 252633223. The reversal of 252633209 is 902336252.

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 85008400 + 167624809 = 9220^2 + 12947^2 .

It is a cyclic number.

It is not a de Polignac number, because 252633209 - 2⁴ = 252633193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252633289) 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, 7430372 + ... + 7430405.

It is an arithmetic number, because the mean of its divisors is an integer number (66873501).

Almost surely, 2^252633209 is an apocalyptic number.

It is an amenable number.

252633209 is a deficient number, since it is larger than the sum of its proper divisors (14860795).

252633209 is a wasteful number, since it uses less digits than its factorization.

252633209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14860794.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 252633209 is about 15894.4395623123. The cubic root of 252633209 is about 632.1645616778.

The spelling of 252633209 in words is "two hundred fifty-two million, six hundred thirty-three thousand, two hundred nine".