322444021 has 2 divisors, whose sum is σ = 322444022. Its totient is φ = 322444020.

The previous prime is 322444019. The next prime is 322444039. The reversal of 322444021 is 120444223.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175695025 + 146748996 = 13255^2 + 12114^2 .

It is a cyclic number.

It is not a de Polignac number, because 322444021 - 2¹ = 322444019 is a prime.

Together with 322444019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 322443983 and 322444001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322444091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161222010 + 161222011.

It is an arithmetic number, because the mean of its divisors is an integer number (161222011).

Almost surely, 2^322444021 is an apocalyptic number.

It is an amenable number.

322444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

322444021 is an equidigital number, since it uses as much as digits as its factorization.

322444021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 322444021 is about 17956.7263441865. The cubic root of 322444021 is about 685.7273046532.

Adding to 322444021 its reverse (120444223), we get a palindrome (442888244).

The spelling of 322444021 in words is "three hundred twenty-two million, four hundred forty-four thousand, twenty-one".