33223231 has 4 divisors (see below), whose sum is σ = 33235272. Its totient is φ = 33211192.

The previous prime is 33223217. The next prime is 33223261. The reversal of 33223231 is 13232233.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13232233 = 7 ⋅1890319.

It is a cyclic number.

It is not a de Polignac number, because 33223231 - 2⁵ = 33223199 is a prime.

It is a super-2 number, since 2×33223231² = 2207566156158722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33223199 and 33223208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33223261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (8308818).

Almost surely, 2^33223231 is an apocalyptic number.

33223231 is a deficient number, since it is larger than the sum of its proper divisors (12041).

33223231 is an equidigital number, since it uses as much as digits as its factorization.

33223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12040.

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

The square root of 33223231 is about 5763.9596632870. The cubic root of 33223231 is about 321.4750618986.

Adding to 33223231 its reverse (13232233), we get a palindrome (46455464).

The spelling of 33223231 in words is "thirty-three million, two hundred twenty-three thousand, two hundred thirty-one".