22220031 has 4 divisors (see below), whose sum is σ = 29626712. Its totient is φ = 14813352.

The previous prime is 22220027. The next prime is 22220041. The reversal of 22220031 is 13002222.

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

It is not a de Polignac number, because 22220031 - 2² = 22220027 is a prime.

It is a super-2 number, since 2×22220031² = 987459555281922, 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 = 22219989 and 22220016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220041) 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, 3703336 + ... + 3703341.

It is an arithmetic number, because the mean of its divisors is an integer number (7406678).

Almost surely, 2^22220031 is an apocalyptic number.

22220031 is a deficient number, since it is larger than the sum of its proper divisors (7406681).

22220031 is an equidigital number, since it uses as much as digits as its factorization.

22220031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406680.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22220031 is about 4713.8127879669. The cubic root of 22220031 is about 281.1349807215.

Adding to 22220031 its reverse (13002222), we get a palindrome (35222253).

The spelling of 22220031 in words is "twenty-two million, two hundred twenty thousand, thirty-one".