222623 has 4 divisors (see below), whose sum is σ = 234360. Its totient is φ = 210888.

The previous prime is 222619. The next prime is 222643. The reversal of 222623 is 326222.

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 222623 - 2² = 222619 is a prime.

It is a super-2 number, since 2×222623² = 99122000258, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222613) 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, 5840 + ... + 5877.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2²²²⁶²³ is an apocalyptic number.

222623 is a deficient number, since it is larger than the sum of its proper divisors (11737).

222623 is a wasteful number, since it uses less digits than its factorization.

222623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11736.

The product of its digits is 288, while the sum is 17.

The square root of 222623 is about 471.8294183283. The cubic root of 222623 is about 60.6070776370.

Adding to 222623 its reverse (326222), we get a palindrome (548845).

The spelling of 222623 in words is "two hundred twenty-two thousand, six hundred twenty-three".