22235231 has 2 divisors, whose sum is σ = 22235232. Its totient is φ = 22235230.

The previous prime is 22235219. The next prime is 22235267. The reversal of 22235231 is 13253222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22235231 is a prime.

It is a super-2 number, since 2×22235231² = 988810995246722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22235281) 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, 11117615 + 11117616.

It is an arithmetic number, because the mean of its divisors is an integer number (11117616).

Almost surely, 2^22235231 is an apocalyptic number.

22235231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22235231 is an equidigital number, since it uses as much as digits as its factorization.

22235231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 20.

The square root of 22235231 is about 4715.4247952862. The cubic root of 22235231 is about 281.1990712063.

Adding to 22235231 its reverse (13253222), we get a palindrome (35488453).

Subtracting from 22235231 its reverse (13253222), we obtain a square (8982009 = 2997²).

It can be divided in two parts, 222 and 35231, that added together give a palindrome (35453).

The spelling of 22235231 in words is "twenty-two million, two hundred thirty-five thousand, two hundred thirty-one".