133513664 has 28 divisors (see below), whose sum is σ = 267385800. Its totient is φ = 66140928.

The previous prime is 133513663. The next prime is 133513673. The reversal of 133513664 is 466315331.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 133513664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133513663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2594 + ... + 16545.

Almost surely, 2^133513664 is an apocalyptic number.

It is an amenable number.

133513664 is an abundant number, since it is smaller than the sum of its proper divisors (133872136).

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

133513664 is a wasteful number, since it uses less digits than its factorization.

133513664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19260 (or 19250 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 133513664 is about 11554.8112922713. The cubic root of 133513664 is about 511.1031663261.

Adding to 133513664 its reverse (466315331), we get a palindrome (599828995).

The spelling of 133513664 in words is "one hundred thirty-three million, five hundred thirteen thousand, six hundred sixty-four".