252117655 has 4 divisors (see below), whose sum is σ = 302541192. Its totient is φ = 201694120.

The previous prime is 252117601. The next prime is 252117659. The reversal of 252117655 is 556711252.

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

It is not a de Polignac number, because 252117655 - 2⁷ = 252117527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252117655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252117659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25211761 + ... + 25211770.

It is an arithmetic number, because the mean of its divisors is an integer number (75635298).

Almost surely, 2^252117655 is an apocalyptic number.

252117655 is a deficient number, since it is larger than the sum of its proper divisors (50423537).

252117655 is an equidigital number, since it uses as much as digits as its factorization.

252117655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50423536.

The product of its digits is 21000, while the sum is 34.

The square root of 252117655 is about 15878.2132181175. The cubic root of 252117655 is about 631.7342449063.

The spelling of 252117655 in words is "two hundred fifty-two million, one hundred seventeen thousand, six hundred fifty-five".