402421442323 has 2 divisors, whose sum is σ = 402421442324. Its totient is φ = 402421442322.

The previous prime is 402421442287. The next prime is 402421442351. The reversal of 402421442323 is 323244124204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402421442323 is a prime.

It is not a weakly prime, because it can be changed into another prime (402421442383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201210721161 + 201210721162.

It is an arithmetic number, because the mean of its divisors is an integer number (201210721162).

Almost surely, 2^402421442323 is an apocalyptic number.

402421442323 is a deficient number, since it is larger than the sum of its proper divisors (1).

402421442323 is an equidigital number, since it uses as much as digits as its factorization.

402421442323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 402421442323 its reverse (323244124204), we get a palindrome (725665566527).

The spelling of 402421442323 in words is "four hundred two billion, four hundred twenty-one million, four hundred forty-two thousand, three hundred twenty-three".