220243031 has 4 divisors (see below), whose sum is σ = 220734000. Its totient is φ = 219752064.

The previous prime is 220243027. The next prime is 220243043. The reversal of 220243031 is 130342022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130342022 = 2 ⋅65171011.

It is a cyclic number.

It is not a de Polignac number, because 220243031 - 2² = 220243027 is a prime.

It is a super-2 number, since 2×220243031² = 97013985408133922, 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 (220243091) 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, 244811 + ... + 245708.

It is an arithmetic number, because the mean of its divisors is an integer number (55183500).

Almost surely, 2^220243031 is an apocalyptic number.

220243031 is a deficient number, since it is larger than the sum of its proper divisors (490969).

220243031 is an equidigital number, since it uses as much as digits as its factorization.

220243031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490968.

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

The square root of 220243031 is about 14840.5872862229. The cubic root of 220243031 is about 603.9032846254.

Adding to 220243031 its reverse (130342022), we get a palindrome (350585053).

The spelling of 220243031 in words is "two hundred twenty million, two hundred forty-three thousand, thirty-one".