133520308 has 6 divisors (see below), whose sum is σ = 233660546. Its totient is φ = 66760152.

The previous prime is 133520293. The next prime is 133520327. The reversal of 133520308 is 803025331.

133520308 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 129686544 + 3833764 = 11388^2 + 1958^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16690035 + ... + 16690042.

Almost surely, 2^133520308 is an apocalyptic number.

It is an amenable number.

133520308 is a deficient number, since it is larger than the sum of its proper divisors (100140238).

133520308 is a wasteful number, since it uses less digits than its factorization.

133520308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33380081 (or 33380079 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 133520308 is about 11555.0987879810. The cubic root of 133520308 is about 511.1116441428. Note that the first 3 decimals are identical.

Adding to 133520308 its reverse (803025331), we get a palindrome (936545639).

The spelling of 133520308 in words is "one hundred thirty-three million, five hundred twenty thousand, three hundred eight".