322641421 has 2 divisors, whose sum is σ = 322641422. Its totient is φ = 322641420.

The previous prime is 322641373. The next prime is 322641433. The reversal of 322641421 is 124146223.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192932100 + 129709321 = 13890^2 + 11389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-322641421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322641461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161320710 + 161320711.

It is an arithmetic number, because the mean of its divisors is an integer number (161320711).

Almost surely, 2^322641421 is an apocalyptic number.

It is an amenable number.

322641421 is a deficient number, since it is larger than the sum of its proper divisors (1).

322641421 is an equidigital number, since it uses as much as digits as its factorization.

322641421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 322641421 is about 17962.2220507375. Note that the first 3 decimals coincide. The cubic root of 322641421 is about 685.8672100296.

Adding to 322641421 its reverse (124146223), we get a palindrome (446787644).

The spelling of 322641421 in words is "three hundred twenty-two million, six hundred forty-one thousand, four hundred twenty-one".