244221681 has 12 divisors (see below), whose sum is σ = 357923216. Its totient is φ = 148012920.

The previous prime is 244221661. The next prime is 244221683. The reversal of 244221681 is 186122442.

It is not a de Polignac number, because 244221681 - 2⁶ = 244221617 is a prime.

It is a super-2 number, since 2×244221681² = 119288458940931522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244221683) 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, 336031 + ... + 336756.

Almost surely, 2^244221681 is an apocalyptic number.

It is an amenable number.

244221681 is a deficient number, since it is larger than the sum of its proper divisors (113701535).

244221681 is a wasteful number, since it uses less digits than its factorization.

244221681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672812 (or 672801 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 244221681 is about 15627.5935767475. The cubic root of 244221681 is about 625.0691601334.

The spelling of 244221681 in words is "two hundred forty-four million, two hundred twenty-one thousand, six hundred eighty-one".