133301231 has 4 divisors (see below), whose sum is σ = 152344272. Its totient is φ = 114258192.

The previous prime is 133301227. The next prime is 133301239. The reversal of 133301231 is 132103331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132103331 = 227 ⋅581953.

It is a cyclic number.

It is not a de Polignac number, because 133301231 - 2² = 133301227 is a prime.

It is a super-2 number, since 2×133301231² = 35538436372230722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133301239) 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 3 ways as a sum of consecutive naturals, for example, 9521510 + ... + 9521523.

It is an arithmetic number, because the mean of its divisors is an integer number (38086068).

Almost surely, 2^133301231 is an apocalyptic number.

133301231 is a deficient number, since it is larger than the sum of its proper divisors (19043041).

133301231 is an equidigital number, since it uses as much as digits as its factorization.

133301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19043040.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133301231 is about 11545.6152283020. The cubic root of 133301231 is about 510.8319511033.

Adding to 133301231 its reverse (132103331), we get a palindrome (265404562).

The spelling of 133301231 in words is "one hundred thirty-three million, three hundred one thousand, two hundred thirty-one".