133230231 has 8 divisors (see below), whose sum is σ = 197378160. Its totient is φ = 88820136.

The previous prime is 133230221. The next prime is 133230233. The reversal of 133230231 is 132032331.

133230231 is a `hidden beast` number, since 1 + 332 + 302 + 31 = 666.

It is not a de Polignac number, because 133230231 - 2⁵ = 133230199 is a prime.

It is a super-2 number, since 2×133230231² = 35500588904626722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133230233) 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, 2467200 + ... + 2467253.

It is an arithmetic number, because the mean of its divisors is an integer number (24672270).

Almost surely, 2^133230231 is an apocalyptic number.

133230231 is a deficient number, since it is larger than the sum of its proper divisors (64147929).

133230231 is an equidigital number, since it uses as much as digits as its factorization.

133230231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934462 (or 4934456 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 133230231 is about 11542.5400584100. The cubic root of 133230231 is about 510.7412404888.

Adding to 133230231 its reverse (132032331), we get a palindrome (265262562).

The spelling of 133230231 in words is "one hundred thirty-three million, two hundred thirty thousand, two hundred thirty-one".