44210021 has 2 divisors, whose sum is σ = 44210022. Its totient is φ = 44210020.

The previous prime is 44209993. The next prime is 44210027. The reversal of 44210021 is 12001244.

44210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28890625 + 15319396 = 5375^2 + 3914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44210021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44209978 and 44210005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44210027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22105010 + 22105011.

It is an arithmetic number, because the mean of its divisors is an integer number (22105011).

Almost surely, 2^44210021 is an apocalyptic number.

It is an amenable number.

44210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

44210021 is an equidigital number, since it uses as much as digits as its factorization.

44210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 44210021 is about 6649.0616631221. The cubic root of 44210021 is about 353.5956446788.

Adding to 44210021 its reverse (12001244), we get a palindrome (56211265).

The spelling of 44210021 in words is "forty-four million, two hundred ten thousand, twenty-one".