220222657 has 4 divisors (see below), whose sum is σ = 220489776. Its totient is φ = 219955540.

The previous prime is 220222637. The next prime is 220222661. The reversal of 220222657 is 756222022.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 220222657 - 2¹⁵ = 220189889 is a prime.

It is a super-2 number, since 2×220222657² = 96996037312279298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220222637) 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, 132319 + ... + 133972.

It is an arithmetic number, because the mean of its divisors is an integer number (55122444).

Almost surely, 2^220222657 is an apocalyptic number.

It is an amenable number.

220222657 is a deficient number, since it is larger than the sum of its proper divisors (267119).

220222657 is an equidigital number, since it uses as much as digits as its factorization.

220222657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267118.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 220222657 is about 14839.9008419868. The cubic root of 220222657 is about 603.8846623109.

Adding to 220222657 its reverse (756222022), we get a palindrome (976444679).

The spelling of 220222657 in words is "two hundred twenty million, two hundred twenty-two thousand, six hundred fifty-seven".