243772223321 has 4 divisors (see below), whose sum is σ = 265933334544. Its totient is φ = 221611112100.

The previous prime is 243772223287. The next prime is 243772223351. The reversal of 243772223321 is 123322277342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243772223321 - 2¹⁸ = 243771961177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243772223351) 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, 11080555595 + ... + 11080555616.

It is an arithmetic number, because the mean of its divisors is an integer number (66483333636).

Almost surely, 2^243772223321 is an apocalyptic number.

It is an amenable number.

243772223321 is a deficient number, since it is larger than the sum of its proper divisors (22161111223).

243772223321 is a wasteful number, since it uses less digits than its factorization.

243772223321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22161111222.

The product of its digits is 169344, while the sum is 38.

The spelling of 243772223321 in words is "two hundred forty-three billion, seven hundred seventy-two million, two hundred twenty-three thousand, three hundred twenty-one".