312222233 has 2 divisors, whose sum is σ = 312222234. Its totient is φ = 312222232.

The previous prime is 312222227. The next prime is 312222301. The reversal of 312222233 is 332222213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312158224 + 64009 = 17668^2 + 253^2 .

It is an emirp because it is prime and its reverse (332222213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312222233 - 2¹⁰ = 312221209 is a prime.

It is not a weakly prime, because it can be changed into another prime (312222203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156111116 + 156111117.

It is an arithmetic number, because the mean of its divisors is an integer number (156111117).

Almost surely, 2^312222233 is an apocalyptic number.

It is an amenable number.

312222233 is a deficient number, since it is larger than the sum of its proper divisors (1).

312222233 is an equidigital number, since it uses as much as digits as its factorization.

312222233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 20.

The square root of 312222233 is about 17669.8113459086. The cubic root of 312222233 is about 678.4032843781.

Subtracting from 312222233 its sum of digits (20), we obtain a palindrome (312222213).

Adding to 312222233 its reverse (332222213), we get a palindrome (644444446).

The spelling of 312222233 in words is "three hundred twelve million, two hundred twenty-two thousand, two hundred thirty-three".