133530568 has 8 divisors (see below), whose sum is σ = 250369830. Its totient is φ = 66765280.

The previous prime is 133530557. The next prime is 133530577. The reversal of 133530568 is 865035331.

It can be written as a sum of positive squares in only one way, i.e., 68856804 + 64673764 = 8298^2 + 8042^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8345653 + ... + 8345668.

Almost surely, 2^133530568 is an apocalyptic number.

It is an amenable number.

133530568 is a deficient number, since it is larger than the sum of its proper divisors (116839262).

133530568 is a wasteful number, since it uses less digits than its factorization.

133530568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16691327 (or 16691323 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 133530568 is about 11555.5427393091. The cubic root of 133530568 is about 511.1247354626.

Adding to 133530568 its reverse (865035331), we get a palindrome (998565899).

The spelling of 133530568 in words is "one hundred thirty-three million, five hundred thirty thousand, five hundred sixty-eight".