133399224 has 96 divisors (see below), whose sum is σ = 428238720. Its totient is φ = 38110176.

The previous prime is 133399223. The next prime is 133399237. The reversal of 133399224 is 422993331.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133399223) 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, 8707 + ... + 18509.

It is an arithmetic number, because the mean of its divisors is an integer number (4460820).

Almost surely, 2^133399224 is an apocalyptic number.

133399224 is a gapful number since it is divisible by the number (14) 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 133399224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214119360).

133399224 is an abundant number, since it is smaller than the sum of its proper divisors (294839496).

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

133399224 is an equidigital number, since it uses as much as digits as its factorization.

133399224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9831 (or 9815 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 133399224 is about 11549.8581809475. The cubic root of 133399224 is about 510.9570954693.

The spelling of 133399224 in words is "one hundred thirty-three million, three hundred ninety-nine thousand, two hundred twenty-four".