405213223 has 2 divisors, whose sum is σ = 405213224. Its totient is φ = 405213222.

The previous prime is 405213203. The next prime is 405213251. The reversal of 405213223 is 322312504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405213223 - 2⁵ = 405213191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405213194 and 405213203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405213203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202606611 + 202606612.

It is an arithmetic number, because the mean of its divisors is an integer number (202606612).

Almost surely, 2^405213223 is an apocalyptic number.

405213223 is a deficient number, since it is larger than the sum of its proper divisors (1).

405213223 is an equidigital number, since it uses as much as digits as its factorization.

405213223 is an odious number, because the sum of its binary digits is odd.

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

The square root of 405213223 is about 20129.9086684466. The cubic root of 405213223 is about 739.9934398006.

Adding to 405213223 its reverse (322312504), we get a palindrome (727525727).

The spelling of 405213223 in words is "four hundred five million, two hundred thirteen thousand, two hundred twenty-three".