220211031 has 4 divisors (see below), whose sum is σ = 293614712. Its totient is φ = 146807352.

The previous prime is 220211021. The next prime is 220211051. The reversal of 220211031 is 130112022.

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

It is not a de Polignac number, because 220211031 - 2⁹ = 220210519 is a prime.

It is a super-2 number, since 2×220211031² = 96985796348165922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220210998 and 220211016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36701836 + ... + 36701841.

It is an arithmetic number, because the mean of its divisors is an integer number (73403678).

Almost surely, 2^220211031 is an apocalyptic number.

220211031 is a deficient number, since it is larger than the sum of its proper divisors (73403681).

220211031 is an equidigital number, since it uses as much as digits as its factorization.

220211031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73403680.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 220211031 is about 14839.5091226091. The cubic root of 220211031 is about 603.8740353592.

Adding to 220211031 its reverse (130112022), we get a palindrome (350323053).

Subtracting from 220211031 its reverse (130112022), we obtain a palindrome (90099009).

The spelling of 220211031 in words is "two hundred twenty million, two hundred eleven thousand, thirty-one".