312222313 has 8 divisors (see below), whose sum is σ = 336512456. Its totient is φ = 287971200.

The previous prime is 312222301. The next prime is 312222329. The reversal of 312222313 is 313222213.

It can be written as a sum of positive squares in 4 ways, for example, as 139877929 + 172344384 = 11827^2 + 13128^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312222313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312222343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8083 + ... + 26263.

It is an arithmetic number, because the mean of its divisors is an integer number (42064057).

Almost surely, 2^312222313 is an apocalyptic number.

It is an amenable number.

312222313 is a deficient number, since it is larger than the sum of its proper divisors (24290143).

312222313 is a wasteful number, since it uses less digits than its factorization.

312222313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19515.

The product of its digits is 432, while the sum is 19.

The square root of 312222313 is about 17669.8136096564. The cubic root of 312222313 is about 678.4033423200.

Adding to 312222313 its reverse (313222213), we get a palindrome (625444526).

The spelling of 312222313 in words is "three hundred twelve million, two hundred twenty-two thousand, three hundred thirteen".