12155233 has 4 divisors (see below), whose sum is σ = 12165120. Its totient is φ = 12145348.

The previous prime is 12155191. The next prime is 12155237. The reversal of 12155233 is 33255121.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12155233 - 2¹⁷ = 12024161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785 + ... + 5662.

It is an arithmetic number, because the mean of its divisors is an integer number (3041280).

Almost surely, 2^12155233 is an apocalyptic number.

It is an amenable number.

12155233 is a deficient number, since it is larger than the sum of its proper divisors (9887).

12155233 is an equidigital number, since it uses as much as digits as its factorization.

12155233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9886.

The product of its digits is 900, while the sum is 22.

The square root of 12155233 is about 3486.4355723289. The cubic root of 12155233 is about 229.9258298965.

The spelling of 12155233 in words is "twelve million, one hundred fifty-five thousand, two hundred thirty-three".