221412244 has 12 divisors (see below), whose sum is σ = 407864800. Its totient is φ = 104879448.

The previous prime is 221412241. The next prime is 221412251. The reversal of 221412244 is 442214122.

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 (221412241) 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, 1456584 + ... + 1456735.

Almost surely, 2^221412244 is an apocalyptic number.

It is an amenable number.

221412244 is a deficient number, since it is larger than the sum of its proper divisors (186452556).

221412244 is a wasteful number, since it uses less digits than its factorization.

221412244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913342 (or 2913340 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 221412244 is about 14879.9275535871. The cubic root of 221412244 is about 604.9700542972.

Adding to 221412244 its reverse (442214122), we get a palindrome (663626366).

The spelling of 221412244 in words is "two hundred twenty-one million, four hundred twelve thousand, two hundred forty-four".