322135421 has 2 divisors, whose sum is σ = 322135422. Its totient is φ = 322135420.

The previous prime is 322135417. The next prime is 322135423. The reversal of 322135421 is 124531223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219336100 + 102799321 = 14810^2 + 10139^2 .

It is a cyclic number.

It is not a de Polignac number, because 322135421 - 2² = 322135417 is a prime.

Together with 322135423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322135423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161067710 + 161067711.

It is an arithmetic number, because the mean of its divisors is an integer number (161067711).

Almost surely, 2^322135421 is an apocalyptic number.

It is an amenable number.

322135421 is a deficient number, since it is larger than the sum of its proper divisors (1).

322135421 is an equidigital number, since it uses as much as digits as its factorization.

322135421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 322135421 is about 17948.1314069181. The cubic root of 322135421 is about 685.5084728785.

Adding to 322135421 its reverse (124531223), we get a palindrome (446666644).

The spelling of 322135421 in words is "three hundred twenty-two million, one hundred thirty-five thousand, four hundred twenty-one".