133223250 has 64 divisors (see below), whose sum is σ = 350064000. Its totient is φ = 33652800.

The previous prime is 133223249. The next prime is 133223261. The reversal of 133223250 is 52322331.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9576 + ... + 18924.

It is an arithmetic number, because the mean of its divisors is an integer number (5469750).

Almost surely, 2^133223250 is an apocalyptic number.

133223250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133223250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175032000).

133223250 is an abundant number, since it is smaller than the sum of its proper divisors (216840750).

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

133223250 is a wasteful number, since it uses less digits than its factorization.

133223250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9388 (or 9378 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133223250 is about 11542.2376513395. The cubic root of 133223250 is about 510.7323197235.

Adding to 133223250 its reverse (52322331), we get a palindrome (185545581).

The spelling of 133223250 in words is "one hundred thirty-three million, two hundred twenty-three thousand, two hundred fifty".