133291212 has 24 divisors (see below), whose sum is σ = 311201856. Its totient is φ = 44403408.

The previous prime is 133291181. The next prime is 133291219. The reversal of 133291212 is 212192331.

It is not an unprimeable number, because it can be changed into a prime (133291219) 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, 32163 + ... + 36069.

It is an arithmetic number, because the mean of its divisors is an integer number (12966744).

Almost surely, 2^133291212 is an apocalyptic number.

133291212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133291212 is an abundant number, since it is smaller than the sum of its proper divisors (177910644).

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

133291212 is a wasteful number, since it uses less digits than its factorization.

133291212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757 (or 6755 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 133291212 is about 11545.1813324867. The cubic root of 133291212 is about 510.8191526380.

It can be divided in two parts, 13329 and 1212, that added together give a palindrome (14541).

The spelling of 133291212 in words is "one hundred thirty-three million, two hundred ninety-one thousand, two hundred twelve".