221440323 has 8 divisors (see below), whose sum is σ = 317965648. Its totient is φ = 136270944.

The previous prime is 221440321. The next prime is 221440381. The reversal of 221440323 is 323044122.

221440323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221440323 - 2¹ = 221440321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221440323.

It is not an unprimeable number, because it can be changed into a prime (221440321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2838940 + ... + 2839017.

It is an arithmetic number, because the mean of its divisors is an integer number (39745706).

Almost surely, 2^221440323 is an apocalyptic number.

221440323 is a deficient number, since it is larger than the sum of its proper divisors (96525325).

221440323 is a wasteful number, since it uses less digits than its factorization.

221440323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677973.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 221440323 is about 14880.8710430539. The cubic root of 221440323 is about 604.9956268609.

Adding to 221440323 its reverse (323044122), we get a palindrome (544484445).

The spelling of 221440323 in words is "two hundred twenty-one million, four hundred forty thousand, three hundred twenty-three".