222215544 has 48 divisors (see below), whose sum is σ = 605470320. Its totient is φ = 73624320.

The previous prime is 222215519. The next prime is 222215549. The reversal of 222215544 is 445512222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222215549) 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, 2784 + ... + 21264.

It is an arithmetic number, because the mean of its divisors is an integer number (12613965).

Almost surely, 2^222215544 is an apocalyptic number.

222215544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222215544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302735160).

222215544 is an abundant number, since it is smaller than the sum of its proper divisors (383254776).

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

222215544 is a wasteful number, since it uses less digits than its factorization.

222215544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18660 (or 18653 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 222215544 is about 14906.8958539328. The cubic root of 222215544 is about 605.7007966490.

Adding to 222215544 its reverse (445512222), we get a palindrome (667727766).

It can be divided in two parts, 2222 and 15544, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 222215544 in words is "two hundred twenty-two million, two hundred fifteen thousand, five hundred forty-four".