133310231 has 4 divisors (see below), whose sum is σ = 139106352. Its totient is φ = 127514112.

The previous prime is 133310183. The next prime is 133310237. The reversal of 133310231 is 132013331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133310231 - 2¹⁴ = 133293847 is a prime.

It is a super-2 number, since 2×133310231² = 35543235378546722, 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 (133310237) 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, 2898026 + ... + 2898071.

It is an arithmetic number, because the mean of its divisors is an integer number (34776588).

Almost surely, 2^133310231 is an apocalyptic number.

133310231 is a deficient number, since it is larger than the sum of its proper divisors (5796121).

133310231 is an equidigital number, since it uses as much as digits as its factorization.

133310231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796120.

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

The square root of 133310231 is about 11546.0049800786. The cubic root of 133310231 is about 510.8434473315.

Adding to 133310231 its reverse (132013331), we get a palindrome (265323562).

The spelling of 133310231 in words is "one hundred thirty-three million, three hundred ten thousand, two hundred thirty-one".