133212191 has 8 divisors (see below), whose sum is σ = 152390784. Its totient is φ = 114070680.

The previous prime is 133212181. The next prime is 133212193. The reversal of 133212191 is 191212331.

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 133212191 - 2⁶ = 133212127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133212193) 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, 1085 + ... + 16358.

It is an arithmetic number, because the mean of its divisors is an integer number (19048848).

Almost surely, 2^133212191 is an apocalyptic number.

133212191 is a deficient number, since it is larger than the sum of its proper divisors (19178593).

133212191 is a wasteful number, since it uses less digits than its factorization.

133212191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18541.

The product of its digits is 324, while the sum is 23.

The square root of 133212191 is about 11541.7585748446. The cubic root of 133212191 is about 510.7181871928.

The spelling of 133212191 in words is "one hundred thirty-three million, two hundred twelve thousand, one hundred ninety-one".