133221224 has 32 divisors (see below), whose sum is σ = 260457120. Its totient is φ = 63825216.

The previous prime is 133221173. The next prime is 133221271. The reversal of 133221224 is 422122331.

It is a junction number, because it is equal to n+sod(n) for n = 133221196 and 133221205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14579 + ... + 21885.

It is an arithmetic number, because the mean of its divisors is an integer number (8139285).

Almost surely, 2^133221224 is an apocalyptic number.

It is an amenable number.

133221224 is a deficient number, since it is larger than the sum of its proper divisors (127235896).

133221224 is a wasteful number, since it uses less digits than its factorization.

133221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7409 (or 7405 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 133221224 is about 11542.1498863946. The cubic root of 133221224 is about 510.7297307136.

Adding to 133221224 its reverse (422122331), we get a palindrome (555343555).

The spelling of 133221224 in words is "one hundred thirty-three million, two hundred twenty-one thousand, two hundred twenty-four".