222657257 has 8 divisors (see below), whose sum is σ = 234609600. Its totient is φ = 210728304.

The previous prime is 222657251. The next prime is 222657269. The reversal of 222657257 is 752756222.

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

It is a cyclic number.

It is not a de Polignac number, because 222657257 - 2²⁴ = 205880041 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 222657257.

It is not an unprimeable number, because it can be changed into a prime (222657251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15788 + ... + 26354.

It is an arithmetic number, because the mean of its divisors is an integer number (29326200).

Almost surely, 2^222657257 is an apocalyptic number.

It is an amenable number.

222657257 is a deficient number, since it is larger than the sum of its proper divisors (11952343).

222657257 is a wasteful number, since it uses less digits than its factorization.

222657257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11695.

The product of its digits is 117600, while the sum is 38.

The square root of 222657257 is about 14921.7042257244. The cubic root of 222657257 is about 606.1018619595.

The spelling of 222657257 in words is "two hundred twenty-two million, six hundred fifty-seven thousand, two hundred fifty-seven".