223221405 has 48 divisors (see below), whose sum is σ = 413300160. Its totient is φ = 102516480.

The previous prime is 223221391. The next prime is 223221437. The reversal of 223221405 is 504122322.

It is not a de Polignac number, because 223221405 - 2¹⁰ = 223220381 is a prime.

It is a super-3 number, since 3×223221405³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31249 + ... + 37721.

It is an arithmetic number, because the mean of its divisors is an integer number (8610420).

Almost surely, 2^223221405 is an apocalyptic number.

It is an amenable number.

223221405 is a deficient number, since it is larger than the sum of its proper divisors (190078755).

223221405 is a wasteful number, since it uses less digits than its factorization.

223221405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522 (or 6511 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 223221405 is about 14940.5958716512. The cubic root of 223221405 is about 606.6133248529.

Adding to 223221405 its reverse (504122322), we get a palindrome (727343727).

The spelling of 223221405 in words is "two hundred twenty-three million, two hundred twenty-one thousand, four hundred five".