252557685 has 12 divisors (see below), whose sum is σ = 437766732. Its totient is φ = 134697408.

The previous prime is 252557681. The next prime is 252557693. The reversal of 252557685 is 586755252.

It can be written as a sum of positive squares in 2 ways, for example, as 119639844 + 132917841 = 10938^2 + 11529^2 .

It is not a de Polignac number, because 252557685 - 2² = 252557681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5612393 = 252557685 / (2 + 5 + 2 + 5 + 5 + 7 + 6 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 252557685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252557681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2806152 + ... + 2806241.

It is an arithmetic number, because the mean of its divisors is an integer number (36480561).

Almost surely, 2^252557685 is an apocalyptic number.

It is an amenable number.

252557685 is a deficient number, since it is larger than the sum of its proper divisors (185209047).

252557685 is a wasteful number, since it uses less digits than its factorization.

252557685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612404 (or 5612401 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 252557685 is about 15892.0635853246. The cubic root of 252557685 is about 632.1015607829.

The spelling of 252557685 in words is "two hundred fifty-two million, five hundred fifty-seven thousand, six hundred eighty-five".