221434342343 has 4 divisors (see below), whose sum is σ = 221435874408. Its totient is φ = 221432810280.

The previous prime is 221434342309. The next prime is 221434342351. The reversal of 221434342343 is 343243434122.

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 221434342343 - 2¹² = 221434338247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221434392343) 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, 523673 + ... + 846818.

It is an arithmetic number, because the mean of its divisors is an integer number (55358968602).

Almost surely, 2^221434342343 is an apocalyptic number.

221434342343 is a deficient number, since it is larger than the sum of its proper divisors (1532065).

221434342343 is a wasteful number, since it uses less digits than its factorization.

221434342343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532064.

The product of its digits is 165888, while the sum is 35.

Adding to 221434342343 its reverse (343243434122), we get a palindrome (564677776465).

The spelling of 221434342343 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-two thousand, three hundred forty-three".