133011506 has 4 divisors (see below), whose sum is σ = 199517262. Its totient is φ = 66505752.

The previous prime is 133011493. The next prime is 133011511. The reversal of 133011506 is 605110331.

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., 117527281 + 15484225 = 10841^2 + 3935^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33252875 + ... + 33252878.

Almost surely, 2^133011506 is an apocalyptic number.

133011506 is a deficient number, since it is larger than the sum of its proper divisors (66505756).

133011506 is an equidigital number, since it uses as much as digits as its factorization.

133011506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66505755.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 133011506 is about 11533.0614322477. The cubic root of 133011506 is about 510.4615915795.

Adding to 133011506 its reverse (605110331), we get a palindrome (738121837).

The spelling of 133011506 in words is "one hundred thirty-three million, eleven thousand, five hundred six".