252806399 has 4 divisors (see below), whose sum is σ = 256006560. Its totient is φ = 249606240.

The previous prime is 252806377. The next prime is 252806401. The reversal of 252806399 is 993608252.

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 252806399 - 2¹⁶ = 252740863 is a prime.

It is a super-2 number, since 2×252806399² = 127822150750694402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252806329) 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, 1599962 + ... + 1600119.

It is an arithmetic number, because the mean of its divisors is an integer number (64001640).

Almost surely, 2^252806399 is an apocalyptic number.

252806399 is a deficient number, since it is larger than the sum of its proper divisors (3200161).

252806399 is an equidigital number, since it uses as much as digits as its factorization.

252806399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200160.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 252806399 is about 15899.8867606030. The cubic root of 252806399 is about 632.3089865692.

The spelling of 252806399 in words is "two hundred fifty-two million, eight hundred six thousand, three hundred ninety-nine".