252143999 has 4 divisors (see below), whose sum is σ = 252194760. Its totient is φ = 252093240.

The previous prime is 252143989. The next prime is 252144023. The reversal of 252143999 is 999341252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252143999 - 2⁸ = 252143743 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 (252143939) 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, 17009 + ... + 28170.

It is an arithmetic number, because the mean of its divisors is an integer number (63048690).

Almost surely, 2^252143999 is an apocalyptic number.

252143999 is a deficient number, since it is larger than the sum of its proper divisors (50761).

252143999 is an equidigital number, since it uses as much as digits as its factorization.

252143999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50760.

The product of its digits is 174960, while the sum is 44.

The square root of 252143999 is about 15879.0427608216. The cubic root of 252143999 is about 631.7562476326.

The spelling of 252143999 in words is "two hundred fifty-two million, one hundred forty-three thousand, nine hundred ninety-nine".