252115565 has 8 divisors (see below), whose sum is σ = 325810968. Its totient is φ = 186177600.

The previous prime is 252115511. The next prime is 252115609. The reversal of 252115565 is 565511252.

It can be written as a sum of positive squares in 4 ways, for example, as 6817321 + 245298244 = 2611^2 + 15662^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252115565 - 2⁸ = 252115309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1939286 + ... + 1939415.

It is an arithmetic number, because the mean of its divisors is an integer number (40726371).

Almost surely, 2^252115565 is an apocalyptic number.

It is an amenable number.

252115565 is a deficient number, since it is larger than the sum of its proper divisors (73695403).

252115565 is a wasteful number, since it uses less digits than its factorization.

252115565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878719.

The product of its digits is 15000, while the sum is 32.

The square root of 252115565 is about 15878.1474045305. The cubic root of 252115565 is about 631.7324992554.

The spelling of 252115565 in words is "two hundred fifty-two million, one hundred fifteen thousand, five hundred sixty-five".