221427822338 has 18 divisors (see below), whose sum is σ = 333828218619. Its totient is φ = 110154580272.

The previous prime is 221427822307. The next prime is 221427822353. The reversal of 221427822338 is 833228724122.

It can be written as a sum of positive squares in 5 ways, for example, as 193549843249 + 27877979089 = 439943^2 + 166967^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332737.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 152392820 + ... + 152394272.

Almost surely, 2^221427822338 is an apocalyptic number.

221427822338 is a deficient number, since it is larger than the sum of its proper divisors (112400396281).

221427822338 is an frugal number, since it uses more digits than its factorization.

221427822338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366 (or 1684 counting only the distinct ones).

The product of its digits is 516096, while the sum is 44.

The spelling of 221427822338 in words is "two hundred twenty-one billion, four hundred twenty-seven million, eight hundred twenty-two thousand, three hundred thirty-eight".