220031 has 12 divisors (see below), whose sum is σ = 272592. Its totient is φ = 173376.

The previous prime is 220021. The next prime is 220057. The reversal of 220031 is 130022.

It is a de Polignac number, because none of the positive numbers 2^k-220031 is a prime.

It is a super-2 number, since 2×220031² = 96827281922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220031.

It is not an unprimeable number, because it can be changed into a prime (220021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5096 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (22716).

2²²⁰⁰³¹ is an apocalyptic number.

220031 is a deficient number, since it is larger than the sum of its proper divisors (52561).

220031 is an equidigital number, since it uses as much as digits as its factorization.

220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 220031 is about 469.0746209293. The cubic root of 220031 is about 60.3709427065.

Adding to 220031 its reverse (130022), we get a palindrome (350053).

Subtracting from 220031 its reverse (130022), we obtain a palindrome (90009).

The spelling of 220031 in words is "two hundred twenty thousand, thirty-one".