252805057 has 16 divisors (see below), whose sum is σ = 266821632. Its totient is φ = 239258880.

The previous prime is 252805043. The next prime is 252805061. The reversal of 252805057 is 750508252.

It is a cyclic number.

It is not a de Polignac number, because 252805057 - 2²³ = 244416449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252805067) 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, 244213 + ... + 245245.

It is an arithmetic number, because the mean of its divisors is an integer number (16676352).

Almost surely, 2^252805057 is an apocalyptic number.

It is an amenable number.

252805057 is a deficient number, since it is larger than the sum of its proper divisors (14016575).

252805057 is a wasteful number, since it uses less digits than its factorization.

252805057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 252805057 is about 15899.8445589886. The cubic root of 252805057 is about 632.3078677155.

It can be divided in two parts, 25 and 2805057, that added together give a palindrome (2805082).

The spelling of 252805057 in words is "two hundred fifty-two million, eight hundred five thousand, fifty-seven".