252861717 has 4 divisors (see below), whose sum is σ = 337148960. Its totient is φ = 168574476.

The previous prime is 252861703. The next prime is 252861733. The reversal of 252861717 is 717168252.

252861717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 252861717 - 2⁸ = 252861461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252861617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42143617 + ... + 42143622.

It is an arithmetic number, because the mean of its divisors is an integer number (84287240).

Almost surely, 2^252861717 is an apocalyptic number.

It is an amenable number.

252861717 is a deficient number, since it is larger than the sum of its proper divisors (84287243).

252861717 is an equidigital number, since it uses as much as digits as its factorization.

252861717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84287242.

The product of its digits is 47040, while the sum is 39.

The square root of 252861717 is about 15901.6262375897. The cubic root of 252861717 is about 632.3551029092.

The spelling of 252861717 in words is "two hundred fifty-two million, eight hundred sixty-one thousand, seven hundred seventeen".