221422366 has 16 divisors (see below), whose sum is σ = 374822640. Its totient is φ = 97175680.

The previous prime is 221422363. The next prime is 221422373. The reversal of 221422366 is 663224122.

221422366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422361) 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, 172891 + ... + 174166.

It is an arithmetic number, because the mean of its divisors is an integer number (23426415).

Almost surely, 2^221422366 is an apocalyptic number.

221422366 is a deficient number, since it is larger than the sum of its proper divisors (153400274).

221422366 is a wasteful number, since it uses less digits than its factorization.

221422366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347099.

The product of its digits is 6912, while the sum is 28.

The square root of 221422366 is about 14880.2676723236. The cubic root of 221422366 is about 604.9792730189.

Adding to 221422366 its reverse (663224122), we get a palindrome (884646488).

The spelling of 221422366 in words is "two hundred twenty-one million, four hundred twenty-two thousand, three hundred sixty-six".