22543031212 has 12 divisors (see below), whose sum is σ = 42484943536. Its totient is φ = 10404475920.

The previous prime is 22543031149. The next prime is 22543031219. The reversal of 22543031212 is 21213034522.

It is not an unprimeable number, because it can be changed into a prime (22543031219) 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, 216759864 + ... + 216759967.

Almost surely, 2^22543031212 is an apocalyptic number.

It is an amenable number.

22543031212 is a deficient number, since it is larger than the sum of its proper divisors (19941912324).

22543031212 is a wasteful number, since it uses less digits than its factorization.

22543031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433519848 (or 433519846 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 22543031212 its reverse (21213034522), we get a palindrome (43756065734).

The spelling of 22543031212 in words is "twenty-two billion, five hundred forty-three million, thirty-one thousand, two hundred twelve".