312220222 has 8 divisors (see below), whose sum is σ = 472707576. Its totient is φ = 154651032.

The previous prime is 312220219. The next prime is 312220231. The reversal of 312220222 is 222022213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 312220196 and 312220205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729273 + ... + 729700.

It is an arithmetic number, because the mean of its divisors is an integer number (59088447).

Almost surely, 2^312220222 is an apocalyptic number.

312220222 is a deficient number, since it is larger than the sum of its proper divisors (160487354).

312220222 is a wasteful number, since it uses less digits than its factorization.

312220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459082.

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

The square root of 312220222 is about 17669.7544408517. The cubic root of 312220222 is about 678.4018278600.

Adding to 312220222 its reverse (222022213), we get a palindrome (534242435).

The spelling of 312220222 in words is "three hundred twelve million, two hundred twenty thousand, two hundred twenty-two".