133164506 has 4 divisors (see below), whose sum is σ = 199746762. Its totient is φ = 66582252.

The previous prime is 133164487. The next prime is 133164523. The reversal of 133164506 is 605461331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 114597025 + 18567481 = 10705^2 + 4309^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33291125 + ... + 33291128.

Almost surely, 2^133164506 is an apocalyptic number.

133164506 is a deficient number, since it is larger than the sum of its proper divisors (66582256).

133164506 is an equidigital number, since it uses as much as digits as its factorization.

133164506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66582255.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 133164506 is about 11539.6926302220. The cubic root of 133164506 is about 510.6572405606.

The spelling of 133164506 in words is "one hundred thirty-three million, one hundred sixty-four thousand, five hundred six".