44221421 has 2 divisors, whose sum is σ = 44221422. Its totient is φ = 44221420.

The previous prime is 44221391. The next prime is 44221447. The reversal of 44221421 is 12412244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 12524521 = 5630^2 + 3539^2 .

It is a cyclic number.

It is not a de Polignac number, because 44221421 - 2⁶ = 44221357 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 44221393 and 44221402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44221481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22110710 + 22110711.

It is an arithmetic number, because the mean of its divisors is an integer number (22110711).

Almost surely, 2^44221421 is an apocalyptic number.

It is an amenable number.

44221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

44221421 is an equidigital number, since it uses as much as digits as its factorization.

44221421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 20.

The square root of 44221421 is about 6649.9188716856. The cubic root of 44221421 is about 353.6260348017.

Adding to 44221421 its reverse (12412244), we get a palindrome (56633665).

The spelling of 44221421 in words is "forty-four million, two hundred twenty-one thousand, four hundred twenty-one".