133221032 has 32 divisors (see below), whose sum is σ = 286053120. Its totient is φ = 56978880.

The previous prime is 133221031. The next prime is 133221047. The reversal of 133221032 is 230122331.

It is a self number, because there is not a number n which added to its sum of digits gives 133221032.

It is not an unprimeable number, because it can be changed into a prime (133221031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29057 + ... + 33327.

It is an arithmetic number, because the mean of its divisors is an integer number (8939160).

Almost surely, 2^133221032 is an apocalyptic number.

It is an amenable number.

133221032 is an abundant number, since it is smaller than the sum of its proper divisors (152832088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133221032 is a wasteful number, since it uses less digits than its factorization.

133221032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4841 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133221032 is about 11542.1415690503. The cubic root of 133221032 is about 510.7294853569.

Adding to 133221032 its reverse (230122331), we get a palindrome (363343363).

The spelling of 133221032 in words is "one hundred thirty-three million, two hundred twenty-one thousand, thirty-two".