22333231 has 2 divisors, whose sum is σ = 22333232. Its totient is φ = 22333230.

The previous prime is 22333217. The next prime is 22333261. The reversal of 22333231 is 13233322.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22333231 is a prime.

It is a super-2 number, since 2×22333231² = 997546413798722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22333199 and 22333208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22333261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11166615 + 11166616.

It is an arithmetic number, because the mean of its divisors is an integer number (11166616).

Almost surely, 2^22333231 is an apocalyptic number.

22333231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22333231 is an equidigital number, since it uses as much as digits as its factorization.

22333231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 19.

The square root of 22333231 is about 4725.8047991850. The cubic root of 22333231 is about 281.6115865517.

Adding to 22333231 its reverse (13233322), we get a palindrome (35566553).

Subtracting from 22333231 its reverse (13233322), we obtain a palindrome (9099909).

The spelling of 22333231 in words is "twenty-two million, three hundred thirty-three thousand, two hundred thirty-one".