133031320 has 32 divisors (see below), whose sum is σ = 299815920. Its totient is φ = 53124480.

The previous prime is 133031299. The next prime is 133031377. The reversal of 133031320 is 23130331.

It is a junction number, because it is equal to n+sod(n) for n = 133031294 and 133031303.

It is a congruent number.

It is an unprimeable number.

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, 25234 + ... + 30046.

Almost surely, 2^133031320 is an apocalyptic number.

133031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133031320 is an abundant number, since it is smaller than the sum of its proper divisors (166784600).

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

133031320 is a wasteful number, since it uses less digits than its factorization.

133031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5515 (or 5511 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 133031320 is about 11533.9204089503. The cubic root of 133031320 is about 510.4869372159.

Adding to 133031320 its reverse (23130331), we get a palindrome (156161651).

The spelling of 133031320 in words is "one hundred thirty-three million, thirty-one thousand, three hundred twenty".