33231223 has 2 divisors, whose sum is σ = 33231224. Its totient is φ = 33231222.

The previous prime is 33231221. The next prime is 33231227. The reversal of 33231223 is 32213233.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 33231223 - 2¹ = 33231221 is a prime.

It is a super-2 number, since 2×33231223² = 2208628364151458, which contains 22 as substring.

Together with 33231221, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33231223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33231221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16615611 + 16615612.

It is an arithmetic number, because the mean of its divisors is an integer number (16615612).

Almost surely, 2^33231223 is an apocalyptic number.

33231223 is a deficient number, since it is larger than the sum of its proper divisors (1).

33231223 is an equidigital number, since it uses as much as digits as its factorization.

33231223 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 33231223 is about 5764.6528950146. The cubic root of 33231223 is about 321.5008372635.

Adding to 33231223 its reverse (32213233), we get a palindrome (65444456).

The spelling of 33231223 in words is "thirty-three million, two hundred thirty-one thousand, two hundred twenty-three".