405214443421 has 2 divisors, whose sum is σ = 405214443422. Its totient is φ = 405214443420.

The previous prime is 405214443379. The next prime is 405214443437. The reversal of 405214443421 is 124344412504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291449899321 + 113764544100 = 539861^2 + 337290^2 .

It is a cyclic number.

It is not a de Polignac number, because 405214443421 - 2²¹ = 405212346269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405214443481) 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, 202607221710 + 202607221711.

It is an arithmetic number, because the mean of its divisors is an integer number (202607221711).

Almost surely, 2^405214443421 is an apocalyptic number.

It is an amenable number.

405214443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

405214443421 is an equidigital number, since it uses as much as digits as its factorization.

405214443421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61440, while the sum is 34.

Adding to 405214443421 its reverse (124344412504), we get a palindrome (529558855925).

The spelling of 405214443421 in words is "four hundred five billion, two hundred fourteen million, four hundred forty-three thousand, four hundred twenty-one".