221844346 has 4 divisors (see below), whose sum is σ = 332766522. Its totient is φ = 110922172.

The previous prime is 221844319. The next prime is 221844347. The reversal of 221844346 is 643448122.

221844346 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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., 215649225 + 6195121 = 14685^2 + 2489^2 .

It is not an unprimeable number, because it can be changed into a prime (221844347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55461085 + ... + 55461088.

Almost surely, 2^221844346 is an apocalyptic number.

221844346 is a deficient number, since it is larger than the sum of its proper divisors (110922176).

221844346 is a wasteful number, since it uses less digits than its factorization.

221844346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110922175.

The product of its digits is 36864, while the sum is 34.

The square root of 221844346 is about 14894.4401036091. The cubic root of 221844346 is about 605.3633461603.

It can be divided in two parts, 2218 and 44346, that added together give a palindrome (46564).

The spelling of 221844346 in words is "two hundred twenty-one million, eight hundred forty-four thousand, three hundred forty-six".