133221308 has 24 divisors (see below), whose sum is σ = 257402880. Its totient is φ = 59823920.

The previous prime is 133221307. The next prime is 133221317. The reversal of 133221308 is 803122331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133221301) 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 7 ways as a sum of consecutive naturals, for example, 14588 + ... + 21891.

It is an arithmetic number, because the mean of its divisors is an integer number (10725120).

Almost surely, 2^133221308 is an apocalyptic number.

It is an amenable number.

133221308 is a deficient number, since it is larger than the sum of its proper divisors (124181572).

133221308 is a wasteful number, since it uses less digits than its factorization.

133221308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36577 (or 36575 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 133221308 is about 11542.1535252309. The cubic root of 133221308 is about 510.7298380571.

Adding to 133221308 its reverse (803122331), we get a palindrome (936343639).

The spelling of 133221308 in words is "one hundred thirty-three million, two hundred twenty-one thousand, three hundred eight".