133220000 has 60 divisors (see below), whose sum is σ = 327790386. Its totient is φ = 53280000.

The previous prime is 133219993. The next prime is 133220011. The reversal of 133220000 is 22331.

It can be written as a sum of positive squares in 5 ways, for example, as 18215824 + 115004176 = 4268^2 + 10724^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16670 + ... + 23330.

Almost surely, 2^133220000 is an apocalyptic number.

133220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163895193).

133220000 is an abundant number, since it is smaller than the sum of its proper divisors (194570386).

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

133220000 is an frugal number, since it uses more digits than its factorization.

133220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691 (or 6668 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 133220000 is about 11542.0968632220. The cubic root of 133220000 is about 510.7281665607.

Adding to 133220000 its reverse (22331), we get a palindrome (133242331).

The spelling of 133220000 in words is "one hundred thirty-three million, two hundred twenty thousand".