221044372 has 6 divisors (see below), whose sum is σ = 386827658. Its totient is φ = 110522184.

The previous prime is 221044357. The next prime is 221044379. The reversal of 221044372 is 273440122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 170406916 + 50637456 = 13054^2 + 7116^2 .

It is a super-2 number, since 2×221044372² = 97721228785748768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221044379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27630543 + ... + 27630550.

Almost surely, 2^221044372 is an apocalyptic number.

It is an amenable number.

221044372 is a deficient number, since it is larger than the sum of its proper divisors (165783286).

221044372 is a wasteful number, since it uses less digits than its factorization.

221044372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55261097 (or 55261095 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 221044372 is about 14867.5610642768. The cubic root of 221044372 is about 604.6348200322.

Adding to 221044372 its reverse (273440122), we get a palindrome (494484494).

The spelling of 221044372 in words is "two hundred twenty-one million, forty-four thousand, three hundred seventy-two".