252713209 has 12 divisors (see below), whose sum is σ = 298440192. Its totient is φ = 209618280.

The previous prime is 252713207. The next prime is 252713233. The reversal of 252713209 is 902317252.

It is not a de Polignac number, because 252713209 - 2¹ = 252713207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252713203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12057 + ... + 25510.

It is an arithmetic number, because the mean of its divisors is an integer number (24870016).

Almost surely, 2^252713209 is an apocalyptic number.

It is an amenable number.

252713209 is a deficient number, since it is larger than the sum of its proper divisors (45726983).

252713209 is an equidigital number, since it uses as much as digits as its factorization.

252713209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37636 (or 37605 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 252713209 is about 15896.9559664736. The cubic root of 252713209 is about 632.2312826866.

The spelling of 252713209 in words is "two hundred fifty-two million, seven hundred thirteen thousand, two hundred nine".