133231211 has 8 divisors (see below), whose sum is σ = 144768000. Its totient is φ = 122146920.

The previous prime is 133231207. The next prime is 133231223. The reversal of 133231211 is 112132331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133231211 - 2² = 133231207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133231211.

It is not an unprimeable number, because it can be changed into a prime (133231201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112511 + ... + 113688.

It is an arithmetic number, because the mean of its divisors is an integer number (18096000).

Almost surely, 2^133231211 is an apocalyptic number.

133231211 is a deficient number, since it is larger than the sum of its proper divisors (11536789).

133231211 is a wasteful number, since it uses less digits than its factorization.

133231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226249.

The product of its digits is 108, while the sum is 17.

The square root of 133231211 is about 11542.5825099932. The cubic root of 133231211 is about 510.7424927701.

Adding to 133231211 its reverse (112132331), we get a palindrome (245363542).

The spelling of 133231211 in words is "one hundred thirty-three million, two hundred thirty-one thousand, two hundred eleven".