220332231 has 28 divisors (see below), whose sum is σ = 377548432. Its totient is φ = 125901216.

The previous prime is 220332209. The next prime is 220332239. The reversal of 220332231 is 132233022.

It is a happy number.

It is not a de Polignac number, because 220332231 - 2⁵ = 220332199 is a prime.

It is a super-2 number, since 2×220332231² = 97092584034874722, 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 (220332239) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 16486 + ... + 26691.

Almost surely, 2^220332231 is an apocalyptic number.

220332231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

220332231 is a deficient number, since it is larger than the sum of its proper divisors (157216201).

220332231 is an frugal number, since it uses more digits than its factorization.

220332231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43202 (or 43187 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 220332231 is about 14843.5922538986. The cubic root of 220332231 is about 603.9848020020.

Adding to 220332231 its reverse (132233022), we get a palindrome (352565253).

The spelling of 220332231 in words is "two hundred twenty million, three hundred thirty-two thousand, two hundred thirty-one".