243221340142303 has 4 divisors (see below), whose sum is σ = 243221451108208. Its totient is φ = 243221229176400.

The previous prime is 243221340142301. The next prime is 243221340142369. The reversal of 243221340142303 is 303241043122342.

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 243221340142303 - 2¹ = 243221340142301 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 (243221340142301) 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, 52127526 + ... + 56601427.

It is an arithmetic number, because the mean of its divisors is an integer number (60805362777052).

Almost surely, 2^{243221340142303} is an apocalyptic number.

243221340142303 is a deficient number, since it is larger than the sum of its proper divisors (110965905).

243221340142303 is a wasteful number, since it uses less digits than its factorization.

243221340142303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110965904.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 243221340142303 its reverse (303241043122342), we get a palindrome (546462383264645).

The spelling of 243221340142303 in words is "two hundred forty-three trillion, two hundred twenty-one billion, three hundred forty million, one hundred forty-two thousand, three hundred three".