133583816 has 16 divisors (see below), whose sum is σ = 261360000. Its totient is φ = 63887824.

The previous prime is 133583803. The next prime is 133583833. The reversal of 133583816 is 618385331.

It is a self number, because there is not a number n which added to its sum of digits gives 133583816.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362816 + ... + 363183.

It is an arithmetic number, because the mean of its divisors is an integer number (16335000).

Almost surely, 2^133583816 is an apocalyptic number.

It is an amenable number.

133583816 is a deficient number, since it is larger than the sum of its proper divisors (127776184).

133583816 is a wasteful number, since it uses less digits than its factorization.

133583816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726028 (or 726024 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 133583816 is about 11557.8465122184. The cubic root of 133583816 is about 511.1926668570.

The spelling of 133583816 in words is "one hundred thirty-three million, five hundred eighty-three thousand, eight hundred sixteen".