252566257 has 4 divisors (see below), whose sum is σ = 252619236. Its totient is φ = 252513280.

The previous prime is 252566233. The next prime is 252566267. The reversal of 252566257 is 752665252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127215841 + 125350416 = 11279^2 + 11196^2 .

It is a cyclic number.

It is not a de Polignac number, because 252566257 - 2¹¹ = 252564209 is a prime.

It is a super-3 number, since 3×252566257³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252566267) 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 3 ways as a sum of consecutive naturals, for example, 18544 + ... + 29137.

It is an arithmetic number, because the mean of its divisors is an integer number (63154809).

Almost surely, 2^252566257 is an apocalyptic number.

It is an amenable number.

252566257 is a deficient number, since it is larger than the sum of its proper divisors (52979).

252566257 is an equidigital number, since it uses as much as digits as its factorization.

252566257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52978.

The product of its digits is 252000, while the sum is 40.

The square root of 252566257 is about 15892.3332774014. Note that the first 3 decimals coincide. The cubic root of 252566257 is about 632.1087120380.

It can be divided in two parts, 25256 and 6257, that added together give a palindrome (31513).

The spelling of 252566257 in words is "two hundred fifty-two million, five hundred sixty-six thousand, two hundred fifty-seven".