22220231 has 16 divisors (see below), whose sum is σ = 25671168. Its totient is φ = 19034400.

The previous prime is 22220227. The next prime is 22220249. The reversal of 22220231 is 13202222.

It is not a de Polignac number, because 22220231 - 2² = 22220227 is a prime.

It is a super-2 number, since 2×22220231² = 987477331386722, 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 (22220281) 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 15 ways as a sum of consecutive naturals, for example, 17345 + ... + 18581.

It is an arithmetic number, because the mean of its divisors is an integer number (1604448).

Almost surely, 2^22220231 is an apocalyptic number.

22220231 is a deficient number, since it is larger than the sum of its proper divisors (3450937).

22220231 is a wasteful number, since it uses less digits than its factorization.

22220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22220231 is about 4713.8340021685. The cubic root of 22220231 is about 281.1358242071.

Adding to 22220231 its reverse (13202222), we get a palindrome (35422453).

Subtracting from 22220231 its reverse (13202222), we obtain a square (9018009 = 3003²).

The spelling of 22220231 in words is "twenty-two million, two hundred twenty thousand, two hundred thirty-one".