133023564 has 18 divisors (see below), whose sum is σ = 336254100. Its totient is φ = 44341176.

The previous prime is 133023479. The next prime is 133023571. The reversal of 133023564 is 465320331.

It is a happy number.

133023564 is a `hidden beast` number, since 1 + 3 + 302 + 356 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1847514 + ... + 1847585.

Almost surely, 2^133023564 is an apocalyptic number.

It is an amenable number.

133023564 is an abundant number, since it is smaller than the sum of its proper divisors (203230536).

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

133023564 is a wasteful number, since it uses less digits than its factorization.

133023564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695109 (or 3695104 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 133023564 is about 11533.5841783896. The cubic root of 133023564 is about 510.4770162097.

Adding to 133023564 its reverse (465320331), we get a palindrome (598343895).

The spelling of 133023564 in words is "one hundred thirty-three million, twenty-three thousand, five hundred sixty-four".