221441144 has 16 divisors (see below), whose sum is σ = 415940400. Its totient is φ = 110523712.

The previous prime is 221441141. The next prime is 221441147. The reversal of 221441144 is 441144122.

It is an interprime number because it is at equal distance from previous prime (221441141) and next prime (221441147).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221441141) 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, 19772 + ... + 28875.

It is an arithmetic number, because the mean of its divisors is an integer number (25996275).

Almost surely, 2^221441144 is an apocalyptic number.

It is an amenable number.

221441144 is a deficient number, since it is larger than the sum of its proper divisors (194499256).

221441144 is a wasteful number, since it uses less digits than its factorization.

221441144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49222 (or 49218 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 221441144 is about 14880.8986287791. The cubic root of 221441144 is about 604.9963745429.

Adding to 221441144 its reverse (441144122), we get a palindrome (662585266).

The spelling of 221441144 in words is "two hundred twenty-one million, four hundred forty-one thousand, one hundred forty-four".