133821416 has 32 divisors (see below), whose sum is σ = 267624000. Its totient is φ = 62512896.

The previous prime is 133821409. The next prime is 133821419. The reversal of 133821416 is 614128331.

133821416 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (133821419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15365 + ... + 22443.

It is an arithmetic number, because the mean of its divisors is an integer number (8363250).

Almost surely, 2^133821416 is an apocalyptic number.

It is an amenable number.

133821416 is a deficient number, since it is larger than the sum of its proper divisors (133802584).

133821416 is a wasteful number, since it uses less digits than its factorization.

133821416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7241 (or 7237 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 133821416 is about 11568.1206771022. The cubic root of 133821416 is about 511.4955664166.

Adding to 133821416 its reverse (614128331), we get a palindrome (747949747).

The spelling of 133821416 in words is "one hundred thirty-three million, eight hundred twenty-one thousand, four hundred sixteen".