222231312 has 60 divisors (see below), whose sum is σ = 642014464. Its totient is φ = 71686080.

The previous prime is 222231311. The next prime is 222231329. The reversal of 222231312 is 213132222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (222231311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20428 + ... + 29355.

Almost surely, 2^222231312 is an apocalyptic number.

It is an amenable number.

222231312 is an abundant number, since it is smaller than the sum of its proper divisors (419783152).

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

222231312 is a wasteful number, since it uses less digits than its factorization.

222231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49828 (or 49819 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 222231312 is about 14907.4247272961. The cubic root of 222231312 is about 605.7151227760.

Adding to 222231312 its reverse (213132222), we get a palindrome (435363534).

The spelling of 222231312 in words is "two hundred twenty-two million, two hundred thirty-one thousand, three hundred twelve".