133553320 has 32 divisors (see below), whose sum is σ = 306892800. Its totient is φ = 52283968.

The previous prime is 133553297. The next prime is 133553347. The reversal of 133553320 is 23355331.

It is a happy 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, 33640 + ... + 37399.

It is an arithmetic number, because the mean of its divisors is an integer number (9590400).

Almost surely, 2^133553320 is an apocalyptic number.

133553320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133553320 is an abundant number, since it is smaller than the sum of its proper divisors (173339480).

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

133553320 is a wasteful number, since it uses less digits than its factorization.

133553320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71097 (or 71093 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 25.

The square root of 133553320 is about 11556.5271600079. The cubic root of 133553320 is about 511.1537636463.

The spelling of 133553320 in words is "one hundred thirty-three million, five hundred fifty-three thousand, three hundred twenty".