133553244 has 48 divisors (see below), whose sum is σ = 345050496. Its totient is φ = 39864000.

The previous prime is 133553237. The next prime is 133553263. The reversal of 133553244 is 442355331.

133553244 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1294 + ... + 16394.

It is an arithmetic number, because the mean of its divisors is an integer number (7188552).

Almost surely, 2^133553244 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 133553244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172525248).

133553244 is an abundant number, since it is smaller than the sum of its proper divisors (211497252).

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

133553244 is a wasteful number, since it uses less digits than its factorization.

133553244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15186 (or 15184 counting only the distinct ones).

The product of its digits is 21600, while the sum is 30.

The square root of 133553244 is about 11556.5238718224. The cubic root of 133553244 is about 511.1536666870.

The spelling of 133553244 in words is "one hundred thirty-three million, five hundred fifty-three thousand, two hundred forty-four".