133221223 has 4 divisors (see below), whose sum is σ = 133288168. Its totient is φ = 133154280.

The previous prime is 133221173. The next prime is 133221271. The reversal of 133221223 is 322122331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322122331 = 43 ⋅7491217.

It is a cyclic number.

It is not a de Polignac number, because 133221223 - 2¹⁷ = 133090151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133221223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133221623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30393 + ... + 34498.

It is an arithmetic number, because the mean of its divisors is an integer number (33322042).

Almost surely, 2^133221223 is an apocalyptic number.

133221223 is a deficient number, since it is larger than the sum of its proper divisors (66945).

133221223 is an equidigital number, since it uses as much as digits as its factorization.

133221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66944.

The product of its digits is 432, while the sum is 19.

The square root of 133221223 is about 11542.1498430752. The cubic root of 133221223 is about 510.7297294357.

Adding to 133221223 its reverse (322122331), we get a palindrome (455343554).

The spelling of 133221223 in words is "one hundred thirty-three million, two hundred twenty-one thousand, two hundred twenty-three".