133312233 has 4 divisors (see below), whose sum is σ = 177749648. Its totient is φ = 88874820.

The previous prime is 133312229. The next prime is 133312253. The reversal of 133312233 is 332213331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133312233 - 2² = 133312229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133312213) 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, 22218703 + ... + 22218708.

It is an arithmetic number, because the mean of its divisors is an integer number (44437412).

Almost surely, 2^133312233 is an apocalyptic number.

It is an amenable number.

133312233 is a deficient number, since it is larger than the sum of its proper divisors (44437415).

133312233 is an equidigital number, since it uses as much as digits as its factorization.

133312233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44437414.

The product of its digits is 972, while the sum is 21.

The square root of 133312233 is about 11546.0916764072. The cubic root of 133312233 is about 510.8460045332.

Adding to 133312233 its reverse (332213331), we get a palindrome (465525564).

The spelling of 133312233 in words is "one hundred thirty-three million, three hundred twelve thousand, two hundred thirty-three".