252155865 has 32 divisors (see below), whose sum is σ = 438996096. Its totient is φ = 122849280.

The previous prime is 252155843. The next prime is 252155873. The reversal of 252155865 is 568551252.

It is not a de Polignac number, because 252155865 - 2¹⁰ = 252154841 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 12250 + ... + 25580.

It is an arithmetic number, because the mean of its divisors is an integer number (13718628).

Almost surely, 2^252155865 is an apocalyptic number.

It is an amenable number.

252155865 is a deficient number, since it is larger than the sum of its proper divisors (186840231).

252155865 is a wasteful number, since it uses less digits than its factorization.

252155865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13449.

The product of its digits is 120000, while the sum is 39.

The square root of 252155865 is about 15879.4163935580. The cubic root of 252155865 is about 631.7661577132.

The spelling of 252155865 in words is "two hundred fifty-two million, one hundred fifty-five thousand, eight hundred sixty-five".