243221422331 has 4 divisors (see below), whose sum is σ = 243405822000. Its totient is φ = 243037022664.

The previous prime is 243221422319. The next prime is 243221422337. The reversal of 243221422331 is 133224122342.

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 243221422331 - 2³⁴ = 226041553147 is a prime.

It is a super-2 number, since 2×243221422331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243221422294 and 243221422303.

It is not an unprimeable number, because it can be changed into a prime (243221422337) 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, 92197856 + ... + 92200493.

It is an arithmetic number, because the mean of its divisors is an integer number (60851455500).

Almost surely, 2^243221422331 is an apocalyptic number.

243221422331 is a deficient number, since it is larger than the sum of its proper divisors (184399669).

243221422331 is a wasteful number, since it uses less digits than its factorization.

243221422331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184399668.

The product of its digits is 13824, while the sum is 29.

Adding to 243221422331 its reverse (133224122342), we get a palindrome (376445544673).

The spelling of 243221422331 in words is "two hundred forty-three billion, two hundred twenty-one million, four hundred twenty-two thousand, three hundred thirty-one".