221423344 has 10 divisors (see below), whose sum is σ = 429007760. Its totient is φ = 110711664.

The previous prime is 221423327. The next prime is 221423393. The reversal of 221423344 is 443324122.

It is a happy number.

221423344 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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6919464 + ... + 6919495.

It is an arithmetic number, because the mean of its divisors is an integer number (42900776).

Almost surely, 2^221423344 is an apocalyptic number.

It is an amenable number.

221423344 is a deficient number, since it is larger than the sum of its proper divisors (207584416).

221423344 is a wasteful number, since it uses less digits than its factorization.

221423344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13838967 (or 13838961 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 221423344 is about 14880.3005345994. The cubic root of 221423344 is about 604.9801637282.

Adding to 221423344 its reverse (443324122), we get a palindrome (664747466).

The spelling of 221423344 in words is "two hundred twenty-one million, four hundred twenty-three thousand, three hundred forty-four".