221411244 has 24 divisors (see below), whose sum is σ = 517084848. Its totient is φ = 73738240.

The previous prime is 221411233. The next prime is 221411251. The reversal of 221411244 is 442114122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221411244.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7024 + ... + 22184.

It is an arithmetic number, because the mean of its divisors is an integer number (21545202).

Almost surely, 2^221411244 is an apocalyptic number.

It is an amenable number.

221411244 is an abundant number, since it is smaller than the sum of its proper divisors (295673604).

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

221411244 is a wasteful number, since it uses less digits than its factorization.

221411244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16385 (or 16383 counting only the distinct ones).

The product of its digits is 512, while the sum is 21.

The square root of 221411244 is about 14879.8939512350. The cubic root of 221411244 is about 604.9691435211.

Adding to 221411244 its reverse (442114122), we get a palindrome (663525366).

The spelling of 221411244 in words is "two hundred twenty-one million, four hundred eleven thousand, two hundred forty-four".