133320312 has 24 divisors (see below), whose sum is σ = 361076040. Its totient is φ = 44440080.

The previous prime is 133320311. The next prime is 133320323. The reversal of 133320312 is 213023331.

133320312 is a `hidden beast` number, since 1 + 33 + 320 + 312 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133320311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 925764 + ... + 925907.

It is an arithmetic number, because the mean of its divisors is an integer number (15044835).

Almost surely, 2^133320312 is an apocalyptic number.

133320312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133320312 is an abundant number, since it is smaller than the sum of its proper divisors (227755728).

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

133320312 is a wasteful number, since it uses less digits than its factorization.

133320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851683 (or 1851676 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 133320312 is about 11546.4415297528. The cubic root of 133320312 is about 510.8563237700.

Adding to 133320312 its reverse (213023331), we get a palindrome (346343643).

The spelling of 133320312 in words is "one hundred thirty-three million, three hundred twenty thousand, three hundred twelve".