223985260818 has 54 divisors (see below), whose sum is σ = 533483069301. Its totient is φ = 67867628400.

The previous prime is 223985260799. The next prime is 223985260853. The reversal of 223985260818 is 818062589322.

It is a happy number.

223985260818 is a `hidden beast` number, since 2 + 2 + 39 + 8 + 526 + 0 + 81 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 198146948769 + 25838312049 = 445137^2 + 160743^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334653.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22082028 + ... + 22092168.

Almost surely, 2^223985260818 is an apocalyptic number.

223985260818 is an abundant number, since it is smaller than the sum of its proper divisors (309497808483).

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

223985260818 is an equidigital number, since it uses as much as digits as its factorization.

223985260818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20312 (or 10157 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 223985260818 in words is "two hundred twenty-three billion, nine hundred eighty-five million, two hundred sixty thousand, eight hundred eighteen".