220923 has 6 divisors (see below), whose sum is σ = 319124. Its totient is φ = 147276.

The previous prime is 220919. The next prime is 220931. The reversal of 220923 is 329022.

It is not a de Polignac number, because 220923 - 2² = 220919 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220896 and 220905.

It is not an unprimeable number, because it can be changed into a prime (220903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12265 + ... + 12282.

2²²⁰⁹²³ is an apocalyptic number.

220923 is a deficient number, since it is larger than the sum of its proper divisors (98201).

220923 is a wasteful number, since it uses less digits than its factorization.

220923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24553 (or 24550 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 220923 is about 470.0244674482. The cubic root of 220923 is about 60.4524134604.

Adding to 220923 its reverse (329022), we get a palindrome (549945).

The spelling of 220923 in words is "two hundred twenty thousand, nine hundred twenty-three".