221402223 has 12 divisors (see below), whose sum is σ = 365489488. Its totient is φ = 126515520.

The previous prime is 221402219. The next prime is 221402243. The reversal of 221402223 is 322204122.

It is not a de Polignac number, because 221402223 - 2² = 221402219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221402196 and 221402205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221402243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1757098 + ... + 1757223.

Almost surely, 2^221402223 is an apocalyptic number.

221402223 is a deficient number, since it is larger than the sum of its proper divisors (144087265).

221402223 is a wasteful number, since it uses less digits than its factorization.

221402223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514334 (or 3514331 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 221402223 is about 14879.5908209870. The cubic root of 221402223 is about 604.9609272856.

Adding to 221402223 its reverse (322204122), we get a palindrome (543606345).

The spelling of 221402223 in words is "two hundred twenty-one million, four hundred two thousand, two hundred twenty-three".