252857663 has 4 divisors (see below), whose sum is σ = 252990408. Its totient is φ = 252724920.

The previous prime is 252857659. The next prime is 252857723. The reversal of 252857663 is 366758252.

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

It is a cyclic number.

It is not a de Polignac number, because 252857663 - 2² = 252857659 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 (252857063) 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, 63473 + ... + 67338.

It is an arithmetic number, because the mean of its divisors is an integer number (63247602).

Almost surely, 2^252857663 is an apocalyptic number.

252857663 is a deficient number, since it is larger than the sum of its proper divisors (132745).

252857663 is a wasteful number, since it uses less digits than its factorization.

252857663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132744.

The product of its digits is 604800, while the sum is 44.

The square root of 252857663 is about 15901.4987658397. The cubic root of 252857663 is about 632.3517234847.

The spelling of 252857663 in words is "two hundred fifty-two million, eight hundred fifty-seven thousand, six hundred sixty-three".