133433220 has 48 divisors (see below), whose sum is σ = 379955520. Its totient is φ = 34978176.

The previous prime is 133433213. The next prime is 133433227. The reversal of 133433220 is 22334331.

It is an interprime number because it is at equal distance from previous prime (133433213) and next prime (133433227).

It is not an unprimeable number, because it can be changed into a prime (133433227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15307 + ... + 22386.

It is an arithmetic number, because the mean of its divisors is an integer number (7915740).

Almost surely, 2^133433220 is an apocalyptic number.

133433220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133433220 is an abundant number, since it is smaller than the sum of its proper divisors (246522300).

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

133433220 is a wasteful number, since it uses less digits than its factorization.

133433220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37764 (or 37762 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 133433220 is about 11551.3297935779. The cubic root of 133433220 is about 511.0004965765. Note that the first 3 decimals are identical.

Adding to 133433220 its reverse (22334331), we get a palindrome (155767551).

The spelling of 133433220 in words is "one hundred thirty-three million, four hundred thirty-three thousand, two hundred twenty".