133441320 has 32 divisors (see below), whose sum is σ = 400324320. Its totient is φ = 35584320.

The previous prime is 133441309. The next prime is 133441369. The reversal of 133441320 is 23144331.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555886 + ... + 556125.

It is an arithmetic number, because the mean of its divisors is an integer number (12510135).

Almost surely, 2^133441320 is an apocalyptic number.

133441320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133441320 is an abundant number, since it is smaller than the sum of its proper divisors (266883000).

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

133441320 is a wasteful number, since it uses less digits than its factorization.

133441320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112025 (or 1112021 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133441320 is about 11551.6803972409. The cubic root of 133441320 is about 511.0108363811.

Adding to 133441320 its reverse (23144331), we get a palindrome (156585651).

The spelling of 133441320 in words is "one hundred thirty-three million, four hundred forty-one thousand, three hundred twenty".