312222133 has 4 divisors (see below), whose sum is σ = 312275488. Its totient is φ = 312168780.

The previous prime is 312222101. The next prime is 312222203. The reversal of 312222133 is 331222213.

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 a cyclic number.

It is not a de Polignac number, because 312222133 - 2⁵ = 312222101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312222133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312222233) 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, 16641 + ... + 30022.

It is an arithmetic number, because the mean of its divisors is an integer number (78068872).

Almost surely, 2^312222133 is an apocalyptic number.

It is an amenable number.

312222133 is a deficient number, since it is larger than the sum of its proper divisors (53355).

312222133 is an equidigital number, since it uses as much as digits as its factorization.

312222133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53354.

The product of its digits is 432, while the sum is 19.

The square root of 312222133 is about 17669.8085162234. The cubic root of 312222133 is about 678.4032119507.

Adding to 312222133 its reverse (331222213), we get a palindrome (643444346).

It can be divided in two parts, 31222213 and 3, that multiplied together give a palindrome (93666639).

The spelling of 312222133 in words is "three hundred twelve million, two hundred twenty-two thousand, one hundred thirty-three".