133241312 has 36 divisors (see below), whose sum is σ = 271731096. Its totient is φ = 64310400.

The previous prime is 133241309. The next prime is 133241333. The reversal of 133241312 is 213142331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24437 + ... + 29387.

It is an arithmetic number, because the mean of its divisors is an integer number (7548086).

Almost surely, 2^133241312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133241312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135865548).

133241312 is an abundant number, since it is smaller than the sum of its proper divisors (138489784).

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

133241312 is an equidigital number, since it uses as much as digits as its factorization.

133241312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019 (or 4982 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 133241312 is about 11543.0200554274. The cubic root of 133241312 is about 510.7553998548.

Adding to 133241312 its reverse (213142331), we get a palindrome (346383643).

The spelling of 133241312 in words is "one hundred thirty-three million, two hundred forty-one thousand, three hundred twelve".