252051399 has 16 divisors (see below), whose sum is σ = 374531040. Its totient is φ = 167529600.

The previous prime is 252051389. The next prime is 252051433. The reversal of 252051399 is 993150252.

It is a happy number.

252051399 is a `hidden beast` number, since 2 + 52 + 0 + 513 + 99 = 666.

It is not a de Polignac number, because 252051399 - 2²⁰ = 251002823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252051379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4752 + ... + 22949.

It is an arithmetic number, because the mean of its divisors is an integer number (23408190).

Almost surely, 2^252051399 is an apocalyptic number.

252051399 is a deficient number, since it is larger than the sum of its proper divisors (122479641).

252051399 is a wasteful number, since it uses less digits than its factorization.

252051399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28047 (or 28041 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 252051399 is about 15876.1267001747. The cubic root of 252051399 is about 631.6789005721.

The spelling of 252051399 in words is "two hundred fifty-two million, fifty-one thousand, three hundred ninety-nine".