221344450 has 12 divisors (see below), whose sum is σ = 411700770. Its totient is φ = 88537760.

The previous prime is 221344427. The next prime is 221344451. The reversal of 221344450 is 54443122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 202863049 + 18481401 = 14243^2 + 4299^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (221344451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2213395 + ... + 2213494.

Almost surely, 2^221344450 is an apocalyptic number.

221344450 is a deficient number, since it is larger than the sum of its proper divisors (190356320).

221344450 is a wasteful number, since it uses less digits than its factorization.

221344450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426901 (or 4426896 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 221344450 is about 14877.6493438984. The cubic root of 221344450 is about 604.9083029298.

Adding to 221344450 its reverse (54443122), we get a palindrome (275787572).

The spelling of 221344450 in words is "two hundred twenty-one million, three hundred forty-four thousand, four hundred fifty".