252239999 has 32 divisors (see below), whose sum is σ = 304223040. Its totient is φ = 206438400.

The previous prime is 252239987. The next prime is 252240007. The reversal of 252239999 is 999932252.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252239999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252239909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1046519 + ... + 1046759.

It is an arithmetic number, because the mean of its divisors is an integer number (9506970).

Almost surely, 2^252239999 is an apocalyptic number.

252239999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

252239999 is a deficient number, since it is larger than the sum of its proper divisors (51983041).

252239999 is a wasteful number, since it uses less digits than its factorization.

252239999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its digits is 787320, while the sum is 50.

The square root of 252239999 is about 15882.0653253914. The cubic root of 252239999 is about 631.8364146597.

The spelling of 252239999 in words is "two hundred fifty-two million, two hundred thirty-nine thousand, nine hundred ninety-nine".