133145312 has 24 divisors (see below), whose sum is σ = 275927400. Its totient is φ = 63068544.

The previous prime is 133145297. The next prime is 133145317. The reversal of 133145312 is 213541331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133145317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108887 + ... + 110102.

It is an arithmetic number, because the mean of its divisors is an integer number (11496975).

Almost surely, 2^133145312 is an apocalyptic number.

It is an amenable number.

133145312 is an abundant number, since it is smaller than the sum of its proper divisors (142782088).

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

133145312 is a wasteful number, since it uses less digits than its factorization.

133145312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219018 (or 219010 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 133145312 is about 11538.8609489845. The cubic root of 133145312 is about 510.6327044277.

Adding to 133145312 its reverse (213541331), we get a palindrome (346686643).

The spelling of 133145312 in words is "one hundred thirty-three million, one hundred forty-five thousand, three hundred twelve".