312312222 has 12 divisors (see below), whose sum is σ = 676676520. Its totient is φ = 104104068.

The previous prime is 312312167. The next prime is 312312241. The reversal of 312312222 is 222213213.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17350679 = 312312222 / (3 + 1 + 2 + 3 + 1 + 2 + 2 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 312312195 and 312312204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8675322 + ... + 8675357.

It is an arithmetic number, because the mean of its divisors is an integer number (56389710).

Almost surely, 2^312312222 is an apocalyptic number.

312312222 is an abundant number, since it is smaller than the sum of its proper divisors (364364298).

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

312312222 is a wasteful number, since it uses less digits than its factorization.

312312222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17350687 (or 17350684 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 312312222 is about 17672.3575676818. The cubic root of 312312222 is about 678.4684548053.

Adding to 312312222 its reverse (222213213), we get a palindrome (534525435).

Subtracting from 312312222 its reverse (222213213), we obtain a palindrome (90099009).

The spelling of 312312222 in words is "three hundred twelve million, three hundred twelve thousand, two hundred twenty-two".