252805257 has 12 divisors (see below), whose sum is σ = 367583424. Its totient is φ = 167419800.

The previous prime is 252805253. The next prime is 252805291. The reversal of 252805257 is 752508252.

252805257 is a `hidden beast` number, since 2 + 52 + 80 + 525 + 7 = 666.

It is not a de Polignac number, because 252805257 - 2² = 252805253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252805253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91653 + ... + 94370.

It is an arithmetic number, because the mean of its divisors is an integer number (30631952).

Almost surely, 2^252805257 is an apocalyptic number.

It is an amenable number.

252805257 is a deficient number, since it is larger than the sum of its proper divisors (114778167).

252805257 is a wasteful number, since it uses less digits than its factorization.

252805257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186180 (or 186177 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 252805257 is about 15899.8508483570. The cubic root of 252805257 is about 632.3080344599.

The spelling of 252805257 in words is "two hundred fifty-two million, eight hundred five thousand, two hundred fifty-seven".