252544509 has 12 divisors (see below), whose sum is σ = 416898976. Its totient is φ = 144311112.

The previous prime is 252544493. The next prime is 252544597. The reversal of 252544509 is 905445252.

It is not a de Polignac number, because 252544509 - 2⁴ = 252544493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252544309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2004259 + ... + 2004384.

Almost surely, 2^252544509 is an apocalyptic number.

It is an amenable number.

252544509 is a deficient number, since it is larger than the sum of its proper divisors (164354467).

252544509 is a wasteful number, since it uses less digits than its factorization.

252544509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008656 (or 4008653 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 252544509 is about 15891.6490333760. The cubic root of 252544509 is about 632.0905682909.

The spelling of 252544509 in words is "two hundred fifty-two million, five hundred forty-four thousand, five hundred nine".