133123320 has 96 divisors (see below), whose sum is σ = 471996720. Its totient is φ = 32271360.

The previous prime is 133123279. The next prime is 133123321. The reversal of 133123320 is 23321331.

133123320 is a `hidden beast` number, since 1 + 331 + 2 + 332 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 133123293 and 133123302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133123321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12849 + ... + 20768.

Almost surely, 2^133123320 is an apocalyptic number.

133123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133123320 is an abundant number, since it is smaller than the sum of its proper divisors (338873400).

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

133123320 is a wasteful number, since it uses less digits than its factorization.

133123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33645 (or 33638 counting only the distinct ones).

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

The square root of 133123320 is about 11537.9079559511. The cubic root of 133123320 is about 510.6045886480.

Adding to 133123320 its reverse (23321331), we get a palindrome (156444651).

The spelling of 133123320 in words is "one hundred thirty-three million, one hundred twenty-three thousand, three hundred twenty".