222423144 has 32 divisors (see below), whose sum is σ = 561462720. Its totient is φ = 73420416.

The previous prime is 222423143. The next prime is 222423167. The reversal of 222423144 is 441324222.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 (222423143) 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, 42517 + ... + 47460.

It is an arithmetic number, because the mean of its divisors is an integer number (17545710).

Almost surely, 2^222423144 is an apocalyptic number.

222423144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

222423144 is an abundant number, since it is smaller than the sum of its proper divisors (339039576).

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

222423144 is a wasteful number, since it uses less digits than its factorization.

222423144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90089 (or 90085 counting only the distinct ones).

The product of its digits is 3072, while the sum is 24.

The square root of 222423144 is about 14913.8574486952. The cubic root of 222423144 is about 605.8893588377.

Adding to 222423144 its reverse (441324222), we get a palindrome (663747366).

The spelling of 222423144 in words is "two hundred twenty-two million, four hundred twenty-three thousand, one hundred forty-four".