221323430344 has 16 divisors (see below), whose sum is σ = 415001343600. Its totient is φ = 110656405392.

The previous prime is 221323430309. The next prime is 221323430347. The reversal of 221323430344 is 443034323122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221323430347) 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, 483702 + ... + 822565.

It is an arithmetic number, because the mean of its divisors is an integer number (25937583975).

Almost surely, 2^221323430344 is an apocalyptic number.

It is an amenable number.

221323430344 is a deficient number, since it is larger than the sum of its proper divisors (193677913256).

221323430344 is a wasteful number, since it uses less digits than its factorization.

221323430344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327452 (or 1327448 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 221323430344 its reverse (443034323122), we get a palindrome (664357753466).

The spelling of 221323430344 in words is "two hundred twenty-one billion, three hundred twenty-three million, four hundred thirty thousand, three hundred forty-four".