22220431 has 2 divisors, whose sum is σ = 22220432. Its totient is φ = 22220430.

The previous prime is 22220417. The next prime is 22220447. The reversal of 22220431 is 13402222.

It is an a-pointer prime, because the next prime (22220447) can be obtained adding 22220431 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22220431 - 2⁵ = 22220399 is a prime.

It is a super-2 number, since 2×22220431² = 987495107651522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220131) 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 as a sum of consecutive naturals, namely, 11110215 + 11110216.

It is an arithmetic number, because the mean of its divisors is an integer number (11110216).

Almost surely, 2^22220431 is an apocalyptic number.

22220431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220431 is an equidigital number, since it uses as much as digits as its factorization.

22220431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22220431 is about 4713.8552162747. The cubic root of 22220431 is about 281.1366676876.

Adding to 22220431 its reverse (13402222), we get a palindrome (35622653).

The spelling of 22220431 in words is "twenty-two million, two hundred twenty thousand, four hundred thirty-one".