221353992234 has 12 divisors (see below), whose sum is σ = 479600316546. Its totient is φ = 73784664072.

The previous prime is 221353992229. The next prime is 221353992259. The reversal of 221353992234 is 432299353122.

221353992234 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 539 + 92 + 23 + 4 = 666.

221353992234 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 174176849025 + 47177143209 = 417345^2 + 217203^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221353992234.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6148721989 + ... + 6148722024.

Almost surely, 2^221353992234 is an apocalyptic number.

221353992234 is an abundant number, since it is smaller than the sum of its proper divisors (258246324312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221353992234 is a wasteful number, since it uses less digits than its factorization.

221353992234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12297444021 (or 12297444018 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 221353992234 in words is "two hundred twenty-one billion, three hundred fifty-three million, nine hundred ninety-two thousand, two hundred thirty-four".