445600021 has 2 divisors, whose sum is σ = 445600022. Its totient is φ = 445600020.

The previous prime is 445600009. The next prime is 445600063. The reversal of 445600021 is 120006544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376942225 + 68657796 = 19415^2 + 8286^2 .

It is a cyclic number.

It is not a de Polignac number, because 445600021 - 2⁹ = 445599509 is a prime.

It is equal to p_23632024 and since 445600021 and 23632024 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 445599965 and 445600001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445600721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222800010 + 222800011.

It is an arithmetic number, because the mean of its divisors is an integer number (222800011).

Almost surely, 2^445600021 is an apocalyptic number.

It is an amenable number.

445600021 is a deficient number, since it is larger than the sum of its proper divisors (1).

445600021 is an equidigital number, since it uses as much as digits as its factorization.

445600021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 445600021 is about 21109.2401805465. The cubic root of 445600021 is about 763.8036584403.

Adding to 445600021 its reverse (120006544), we get a palindrome (565606565).

It can be divided in two parts, 44 and 5600021, that added together give a palindrome (5600065).

The spelling of 445600021 in words is "four hundred forty-five million, six hundred thousand, twenty-one".