133520244 has 192 divisors, whose sum is σ = 406425600. Its totient is φ = 33454080.

The previous prime is 133520243. The next prime is 133520251. The reversal of 133520244 is 442025331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133520243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 670857 + ... + 671055.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^133520244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133520244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203212800).

133520244 is an abundant number, since it is smaller than the sum of its proper divisors (272905356).

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

133520244 is a wasteful number, since it uses less digits than its factorization.

133520244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 133520244 is about 11555.0960186404. The cubic root of 133520244 is about 511.1115624795. Note that the first 3 decimals are identical.

Adding to 133520244 its reverse (442025331), we get a palindrome (575545575).

The spelling of 133520244 in words is "one hundred thirty-three million, five hundred twenty thousand, two hundred forty-four".