133523664 has 20 divisors (see below), whose sum is σ = 344936256. Its totient is φ = 44507872.

The previous prime is 133523657. The next prime is 133523723. The reversal of 133523664 is 466325331.

It is a congruent number.

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, 1390824 + ... + 1390919.

Almost surely, 2^133523664 is an apocalyptic number.

It is an amenable number.

133523664 is an abundant number, since it is smaller than the sum of its proper divisors (211412592).

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

133523664 is a wasteful number, since it uses less digits than its factorization.

133523664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781754 (or 2781748 counting only the distinct ones).

The product of its digits is 38880, while the sum is 33.

The square root of 133523664 is about 11555.2440043471. The cubic root of 133523664 is about 511.1159263286.

Adding to 133523664 its reverse (466325331), we get a palindrome (599848995).

The spelling of 133523664 in words is "one hundred thirty-three million, five hundred twenty-three thousand, six hundred sixty-four".