312022222 has 4 divisors (see below), whose sum is σ = 468033336. Its totient is φ = 156011110.

The previous prime is 312022189. The next prime is 312022231. The reversal of 312022222 is 222220213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222220213 = 11777 ⋅18869.

312022222 is a modest number, since divided by 22222 gives 3120 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 312022196 and 312022205.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 78005554 + ... + 78005557.

It is an arithmetic number, because the mean of its divisors is an integer number (117008334).

Almost surely, 2^312022222 is an apocalyptic number.

312022222 is a deficient number, since it is larger than the sum of its proper divisors (156011114).

312022222 is a wasteful number, since it uses less digits than its factorization.

312022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156011113.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 312022222 is about 17664.1507579617. The cubic root of 312022222 is about 678.2583906780.

Adding to 312022222 its reverse (222220213), we get a palindrome (534242435).

The spelling of 312022222 in words is "three hundred twelve million, twenty-two thousand, two hundred twenty-two".