221444107 has 4 divisors (see below), whose sum is σ = 233099080. Its totient is φ = 209789136.

The previous prime is 221444099. The next prime is 221444131. The reversal of 221444107 is 701444122.

221444107 is digitally balanced in base 2, 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 is a cyclic number.

It is not a de Polignac number, because 221444107 - 2³ = 221444099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221444137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5827458 + ... + 5827495.

It is an arithmetic number, because the mean of its divisors is an integer number (58274770).

Almost surely, 2^221444107 is an apocalyptic number.

221444107 is a deficient number, since it is larger than the sum of its proper divisors (11654973).

221444107 is a wasteful number, since it uses less digits than its factorization.

221444107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11654972.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 221444107 is about 14880.9981856057. The cubic root of 221444107 is about 604.9990729216. Note that the first 3 decimals are identical.

Adding to 221444107 its reverse (701444122), we get a palindrome (922888229).

The spelling of 221444107 in words is "two hundred twenty-one million, four hundred forty-four thousand, one hundred seven".