220423031 has 4 divisors (see below), whose sum is σ = 225549192. Its totient is φ = 215296872.

The previous prime is 220423019. The next prime is 220423033. The reversal of 220423031 is 130324022.

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

It is not a de Polignac number, because 220423031 - 2⁶ = 220422967 is a prime.

It is a super-2 number, since 2×220423031² = 97172625190453922, 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 (220423033) 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, 2563016 + ... + 2563101.

It is an arithmetic number, because the mean of its divisors is an integer number (56387298).

Almost surely, 2^220423031 is an apocalyptic number.

220423031 is a deficient number, since it is larger than the sum of its proper divisors (5126161).

220423031 is an equidigital number, since it uses as much as digits as its factorization.

220423031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126160.

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

The square root of 220423031 is about 14846.6504976712. The cubic root of 220423031 is about 604.0677589801.

Adding to 220423031 its reverse (130324022), we get a palindrome (350747053).

Subtracting from 220423031 its reverse (130324022), we obtain a palindrome (90099009).

The spelling of 220423031 in words is "two hundred twenty million, four hundred twenty-three thousand, thirty-one".