22031233 has 8 divisors (see below), whose sum is σ = 25692800. Its totient is φ = 18883620.

The previous prime is 22031209. The next prime is 22031237. The reversal of 22031233 is 33213022.

It is a de Polignac number, because none of the positive numbers 2^k-22031233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22031237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31773 + ... + 32458.

It is an arithmetic number, because the mean of its divisors is an integer number (3211600).

Almost surely, 2^22031233 is an apocalyptic number.

It is an amenable number.

22031233 is a deficient number, since it is larger than the sum of its proper divisors (3661567).

22031233 is an frugal number, since it uses more digits than its factorization.

22031233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64252 (or 64238 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 22031233 is about 4693.7440279589. The cubic root of 22031233 is about 280.3364705080.

Adding to 22031233 its reverse (33213022), we get a palindrome (55244255).

The spelling of 22031233 in words is "twenty-two million, thirty-one thousand, two hundred thirty-three".