221244346 has 4 divisors (see below), whose sum is σ = 331866522. Its totient is φ = 110622172.

The previous prime is 221244329. The next prime is 221244347. The reversal of 221244346 is 643442122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113188321 + 108056025 = 10639^2 + 10395^2 .

It is not an unprimeable number, because it can be changed into a prime (221244347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55311085 + ... + 55311088.

Almost surely, 2^221244346 is an apocalyptic number.

221244346 is a deficient number, since it is larger than the sum of its proper divisors (110622176).

221244346 is a wasteful number, since it uses less digits than its factorization.

221244346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110622175.

The product of its digits is 9216, while the sum is 28.

The square root of 221244346 is about 14874.2847222984. The cubic root of 221244346 is about 604.8170983666.

Adding to 221244346 its reverse (643442122), we get a palindrome (864686468).

The spelling of 221244346 in words is "two hundred twenty-one million, two hundred forty-four thousand, three hundred forty-six".