221339904343 has 4 divisors (see below), whose sum is σ = 222289861248. Its totient is φ = 220389947440.

The previous prime is 221339904319. The next prime is 221339904347. The reversal of 221339904343 is 343409933122.

It is a happy number.

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 221339904343 - 2³⁷ = 83900950871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221339904343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221339904347) 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, 474978103 + ... + 474978568.

It is an arithmetic number, because the mean of its divisors is an integer number (55572465312).

Almost surely, 2^221339904343 is an apocalyptic number.

221339904343 is a deficient number, since it is larger than the sum of its proper divisors (949956905).

221339904343 is an equidigital number, since it uses as much as digits as its factorization.

221339904343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949956904.

The product of its (nonzero) digits is 419904, while the sum is 43.

The spelling of 221339904343 in words is "two hundred twenty-one billion, three hundred thirty-nine million, nine hundred four thousand, three hundred forty-three".