133220232 has 48 divisors (see below), whose sum is σ = 376496640. Its totient is φ = 42475488.

The previous prime is 133220189. The next prime is 133220249. The reversal of 133220232 is 232022331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38568 + ... + 41879.

It is an arithmetic number, because the mean of its divisors is an integer number (7843680).

Almost surely, 2^133220232 is an apocalyptic number.

133220232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133220232 is an abundant number, since it is smaller than the sum of its proper divisors (243276408).

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

133220232 is a wasteful number, since it uses less digits than its factorization.

133220232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80482 (or 80475 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 133220232 is about 11542.1069133846. The cubic root of 133220232 is about 510.7284630349.

Adding to 133220232 its reverse (232022331), we get a palindrome (365242563).

The spelling of 133220232 in words is "one hundred thirty-three million, two hundred twenty thousand, two hundred thirty-two".