44221561 has 8 divisors (see below), whose sum is σ = 44685000. Its totient is φ = 43760640.

The previous prime is 44221559. The next prime is 44221601. The reversal of 44221561 is 16512244.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6325225 + 37896336 = 2515^2 + 6156^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 44221561 - 2¹ = 44221559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44281561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66571 + ... + 67231.

It is an arithmetic number, because the mean of its divisors is an integer number (5585625).

Almost surely, 2^44221561 is an apocalyptic number.

It is an amenable number.

44221561 is a deficient number, since it is larger than the sum of its proper divisors (463439).

44221561 is a wasteful number, since it uses less digits than its factorization.

44221561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259.

The product of its digits is 1920, while the sum is 25.

The square root of 44221561 is about 6649.9293981215. The cubic root of 44221561 is about 353.6264079813.

The spelling of 44221561 in words is "forty-four million, two hundred twenty-one thousand, five hundred sixty-one".