405321223 has 2 divisors, whose sum is σ = 405321224. Its totient is φ = 405321222.

The previous prime is 405321221. The next prime is 405321227. The reversal of 405321223 is 322123504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405321223 - 2¹ = 405321221 is a prime.

Together with 405321221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 405321194 and 405321203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405321221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202660611 + 202660612.

It is an arithmetic number, because the mean of its divisors is an integer number (202660612).

Almost surely, 2^405321223 is an apocalyptic number.

405321223 is a deficient number, since it is larger than the sum of its proper divisors (1).

405321223 is an equidigital number, since it uses as much as digits as its factorization.

405321223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 405321223 is about 20132.5910652355. The cubic root of 405321223 is about 740.0591765435.

Adding to 405321223 its reverse (322123504), we get a palindrome (727444727).

The spelling of 405321223 in words is "four hundred five million, three hundred twenty-one thousand, two hundred twenty-three".