22223243421 has 24 divisors (see below), whose sum is σ = 34015995000. Its totient is φ = 13932711936.

The previous prime is 22223243417. The next prime is 22223243447. The reversal of 22223243421 is 12434232222.

22223243421 is a `hidden beast` number, since 2 + 2 + 2 + 232 + 4 + 3 + 421 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 671535396 + 21551708025 = 25914^2 + 146805^2 .

It is not a de Polignac number, because 22223243421 - 2² = 22223243417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22223243401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132951 + ... + 249243.

It is an arithmetic number, because the mean of its divisors is an integer number (1417333125).

Almost surely, 2^22223243421 is an apocalyptic number.

It is an amenable number.

22223243421 is a deficient number, since it is larger than the sum of its proper divisors (11792751579).

22223243421 is a wasteful number, since it uses less digits than its factorization.

22223243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117565 (or 117562 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

Adding to 22223243421 its reverse (12434232222), we get a palindrome (34657475643).

The spelling of 22223243421 in words is "twenty-two billion, two hundred twenty-three million, two hundred forty-three thousand, four hundred twenty-one".