133308538 has 16 divisors (see below), whose sum is σ = 219591360. Its totient is φ = 60192000.

The previous prime is 133308533. The next prime is 133308551. The reversal of 133308538 is 835803331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (133308533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16743 + ... + 23386.

It is an arithmetic number, because the mean of its divisors is an integer number (13724460).

Almost surely, 2^133308538 is an apocalyptic number.

133308538 is a deficient number, since it is larger than the sum of its proper divisors (86282822).

133308538 is a wasteful number, since it uses less digits than its factorization.

133308538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40293.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 133308538 is about 11545.9316644435. The cubic root of 133308538 is about 510.8412848028.

The spelling of 133308538 in words is "one hundred thirty-three million, three hundred eight thousand, five hundred thirty-eight".