221266223 has 8 divisors (see below), whose sum is σ = 223068192. Its totient is φ = 219469536.

The previous prime is 221266183. The next prime is 221266247. The reversal of 221266223 is 322662122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221266223 - 2⁶ = 221266159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221266192 and 221266201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221266523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136886 + ... + 138492.

It is an arithmetic number, because the mean of its divisors is an integer number (27883524).

Almost surely, 2^221266223 is an apocalyptic number.

221266223 is a deficient number, since it is larger than the sum of its proper divisors (1801969).

221266223 is a wasteful number, since it uses less digits than its factorization.

221266223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641.

The product of its digits is 3456, while the sum is 26.

The square root of 221266223 is about 14875.0201008268. The cubic root of 221266223 is about 604.8370328083.

The spelling of 221266223 in words is "two hundred twenty-one million, two hundred sixty-six thousand, two hundred twenty-three".