221434323403 has 4 divisors (see below), whose sum is σ = 221485956120. Its totient is φ = 221382690688.

The previous prime is 221434323389. The next prime is 221434323431. The reversal of 221434323403 is 304323434122.

It is a happy number.

221434323403 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 221434323403 - 2²⁹ = 220897452491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221434323433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25809925 + ... + 25818502.

It is an arithmetic number, because the mean of its divisors is an integer number (55371489030).

Almost surely, 2^221434323403 is an apocalyptic number.

221434323403 is a deficient number, since it is larger than the sum of its proper divisors (51632717).

221434323403 is an equidigital number, since it uses as much as digits as its factorization.

221434323403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51632716.

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

Adding to 221434323403 its reverse (304323434122), we get a palindrome (525757757525).

The spelling of 221434323403 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred twenty-three thousand, four hundred three".