133366231 has 4 divisors (see below), whose sum is σ = 133393000. Its totient is φ = 133339464.

The previous prime is 133366217. The next prime is 133366237. The reversal of 133366231 is 132663331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132663331 = 41 ⋅3235691.

It is a cyclic number.

It is not a de Polignac number, because 133366231 - 2¹¹ = 133364183 is a prime.

It is a super-2 number, since 2×133366231² = 35573103142290722, which contains 22 as substring.

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 133366231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133366237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3456 + ... + 16693.

It is an arithmetic number, because the mean of its divisors is an integer number (33348250).

Almost surely, 2^133366231 is an apocalyptic number.

133366231 is a deficient number, since it is larger than the sum of its proper divisors (26769).

133366231 is an equidigital number, since it uses as much as digits as its factorization.

133366231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26768.

The product of its digits is 5832, while the sum is 28.

The square root of 133366231 is about 11548.4298066880. The cubic root of 133366231 is about 510.9149677944.

The spelling of 133366231 in words is "one hundred thirty-three million, three hundred sixty-six thousand, two hundred thirty-one".