312345222 has 32 divisors (see below), whose sum is σ = 714776832. Its totient is φ = 89135904.

The previous prime is 312345211. The next prime is 312345239. The reversal of 312345222 is 222543213.

It is a junction number, because it is equal to n+sod(n) for n = 312345192 and 312345201.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 35848 + ... + 43700.

It is an arithmetic number, because the mean of its divisors is an integer number (22336776).

Almost surely, 2^312345222 is an apocalyptic number.

312345222 is an abundant number, since it is smaller than the sum of its proper divisors (402431610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312345222 is a wasteful number, since it uses less digits than its factorization.

312345222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8812.

The product of its digits is 2880, while the sum is 24.

The square root of 312345222 is about 17673.2912045267. The cubic root of 312345222 is about 678.4923504124.

Adding to 312345222 its reverse (222543213), we get a palindrome (534888435).

The spelling of 312345222 in words is "three hundred twelve million, three hundred forty-five thousand, two hundred twenty-two".