252391109 has 4 divisors (see below), whose sum is σ = 253289580. Its totient is φ = 251492640.

The previous prime is 252391093. The next prime is 252391169. The reversal of 252391109 is 901193252.

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 127622209 + 124768900 = 11297^2 + 11170^2 .

It is a cyclic number.

It is not a de Polignac number, because 252391109 - 2⁴ = 252391093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252391169) 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, 448814 + ... + 449375.

It is an arithmetic number, because the mean of its divisors is an integer number (63322395).

Almost surely, 2^252391109 is an apocalyptic number.

It is an amenable number.

252391109 is a deficient number, since it is larger than the sum of its proper divisors (898471).

252391109 is an equidigital number, since it uses as much as digits as its factorization.

252391109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898470.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 252391109 is about 15886.8218659366. The cubic root of 252391109 is about 631.9625613738.

The spelling of 252391109 in words is "two hundred fifty-two million, three hundred ninety-one thousand, one hundred nine".