221226305 has 8 divisors (see below), whose sum is σ = 277013952. Its totient is φ = 169286128.

The previous prime is 221226289. The next prime is 221226311. The reversal of 221226305 is 503622122.

221226305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221226305 - 2⁴ = 221226289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961739 + ... + 961968.

It is an arithmetic number, because the mean of its divisors is an integer number (34626744).

Almost surely, 2^221226305 is an apocalyptic number.

It is an amenable number.

221226305 is a deficient number, since it is larger than the sum of its proper divisors (55787647).

221226305 is a wasteful number, since it uses less digits than its factorization.

221226305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923735.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 221226305 is about 14873.6782606052. The cubic root of 221226305 is about 604.8006583203.

Adding to 221226305 its reverse (503622122), we get a palindrome (724848427).

The spelling of 221226305 in words is "two hundred twenty-one million, two hundred twenty-six thousand, three hundred five".