312816222 has 16 divisors (see below), whose sum is σ = 695147280. Its totient is φ = 104272056.

The previous prime is 312816199. The next prime is 312816239. The reversal of 312816222 is 222618213.

312816222 is a `hidden beast` number, since 31 + 2 + 8 + 1 + 622 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2896393 + ... + 2896500.

It is an arithmetic number, because the mean of its divisors is an integer number (43446705).

Almost surely, 2^312816222 is an apocalyptic number.

312816222 is an abundant number, since it is smaller than the sum of its proper divisors (382331058).

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

312816222 is a wasteful number, since it uses less digits than its factorization.

312816222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792904 (or 5792898 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 312816222 is about 17686.6113769710. The cubic root of 312816222 is about 678.8332226028.

The spelling of 312816222 in words is "three hundred twelve million, eight hundred sixteen thousand, two hundred twenty-two".