220231 has 4 divisors (see below), whose sum is σ = 240264. Its totient is φ = 200200.

The previous prime is 220217. The next prime is 220243. The reversal of 220231 is 132022.

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

It is not a de Polignac number, because 220231 - 2¹³ = 212039 is a prime.

It is a super-2 number, since 2×220231² = 97003386722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220291) 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, 10000 + ... + 10021.

It is an arithmetic number, because the mean of its divisors is an integer number (60066).

2²²⁰²³¹ is an apocalyptic number.

220231 is a deficient number, since it is larger than the sum of its proper divisors (20033).

220231 is a wasteful number, since it uses less digits than its factorization.

220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20032.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 220231 is about 469.2877582039. The cubic root of 220231 is about 60.3892288148.

Adding to 220231 its reverse (132022), we get a palindrome (352253).

Subtracting from 220231 its reverse (132022), we obtain a square (88209 = 297²).

The spelling of 220231 in words is "two hundred twenty thousand, two hundred thirty-one".