312322222 has 4 divisors (see below), whose sum is σ = 468483336. Its totient is φ = 156161110.

The previous prime is 312322183. The next prime is 312322261. The reversal of 312322222 is 222223213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222223213 = 293 ⋅758441.

It is an interprime number because it is at equal distance from previous prime (312322183) and next prime (312322261).

It is a self number, because there is not a number n which added to its sum of digits gives 312322222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78080554 + ... + 78080557.

It is an arithmetic number, because the mean of its divisors is an integer number (117120834).

Almost surely, 2^312322222 is an apocalyptic number.

312322222 is a deficient number, since it is larger than the sum of its proper divisors (156161114).

312322222 is a wasteful number, since it uses less digits than its factorization.

312322222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156161113.

The product of its digits is 576, while the sum is 19.

The square root of 312322222 is about 17672.6404931465. The cubic root of 312322222 is about 678.4756960761.

Adding to 312322222 its reverse (222223213), we get a palindrome (534545435).

Subtracting from 312322222 its reverse (222223213), we obtain a palindrome (90099009).

The spelling of 312322222 in words is "three hundred twelve million, three hundred twenty-two thousand, two hundred twenty-two".