312013222 has 4 divisors (see below), whose sum is σ = 468019836. Its totient is φ = 156006610.

The previous prime is 312013211. The next prime is 312013237. The reversal of 312013222 is 222310213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222310213 = 467 ⋅476039.

It is a junction number, because it is equal to n+sod(n) for n = 312013196 and 312013205.

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, 78003304 + ... + 78003307.

It is an arithmetic number, because the mean of its divisors is an integer number (117004959).

Almost surely, 2^312013222 is an apocalyptic number.

312013222 is a deficient number, since it is larger than the sum of its proper divisors (156006614).

312013222 is a wasteful number, since it uses less digits than its factorization.

312013222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156006613.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312013222 is about 17663.8960028641. The cubic root of 312013222 is about 678.2518693644.

Adding to 312013222 its reverse (222310213), we get a palindrome (534323435).

The spelling of 312013222 in words is "three hundred twelve million, thirteen thousand, two hundred twenty-two".