222311312 has 20 divisors (see below), whose sum is σ = 456065676. Its totient is φ = 104616960.

The previous prime is 222311311. The next prime is 222311317. The reversal of 222311312 is 213113222.

It can be written as a sum of positive squares in 2 ways, for example, as 93624976 + 128686336 = 9676^2 + 11344^2 .

It is a super-2 number, since 2×222311312² = 98844638886322688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (222311311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408389 + ... + 408932.

Almost surely, 2^222311312 is an apocalyptic number.

It is an amenable number.

222311312 is an abundant number, since it is smaller than the sum of its proper divisors (233754364).

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

222311312 is a wasteful number, since it uses less digits than its factorization.

222311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817346 (or 817340 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 222311312 is about 14910.1077125553. The cubic root of 222311312 is about 605.7877968978.

Adding to 222311312 its reverse (213113222), we get a palindrome (435424534).

The spelling of 222311312 in words is "two hundred twenty-two million, three hundred eleven thousand, three hundred twelve".