252292509 has 16 divisors (see below), whose sum is σ = 427162240. Its totient is φ = 144167040.

The previous prime is 252292493. The next prime is 252292517. The reversal of 252292509 is 905292252.

It is not a de Polignac number, because 252292509 - 2⁴ = 252292493 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 (252292559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667252 + ... + 667629.

It is an arithmetic number, because the mean of its divisors is an integer number (26697640).

Almost surely, 2^252292509 is an apocalyptic number.

It is an amenable number.

252292509 is a deficient number, since it is larger than the sum of its proper divisors (174869731).

252292509 is a wasteful number, since it uses less digits than its factorization.

252292509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334897 (or 1334891 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 252292509 is about 15883.7183618950. The cubic root of 252292509 is about 631.8802557479.

The spelling of 252292509 in words is "two hundred fifty-two million, two hundred ninety-two thousand, five hundred nine".