133816 has 16 divisors (see below), whose sum is σ = 257400. Its totient is φ = 65184.

The previous prime is 133813. The next prime is 133831. The reversal of 133816 is 618331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150 + ... + 538.

2¹³³⁸¹⁶ is an apocalyptic number.

It is an amenable number.

133816 is a deficient number, since it is larger than the sum of its proper divisors (123584).

133816 is a wasteful number, since it uses less digits than its factorization.

133816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 434 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 133816 is about 365.8086931717. The cubic root of 133816 is about 51.1488665933.

It can be divided in two parts, 133 and 816, that added together give a palindrome (949).

The spelling of 133816 in words is "one hundred thirty-three thousand, eight hundred sixteen".