223918335218 has 6 divisors (see below), whose sum is σ = 335878506639. Its totient is φ = 111958833006.

The previous prime is 223918335191. The next prime is 223918335229. The reversal of 223918335218 is 812533819322.

It can be written as a sum of positive squares in only one way, i.e., 111959167609 + 111959167609 = 334603^2 + 334603^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334603.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 501905 + ... + 836507.

Almost surely, 2^223918335218 is an apocalyptic number.

223918335218 is a deficient number, since it is larger than the sum of its proper divisors (111960171421).

223918335218 is an frugal number, since it uses more digits than its factorization.

223918335218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669208 (or 334605 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The spelling of 223918335218 in words is "two hundred twenty-three billion, nine hundred eighteen million, three hundred thirty-five thousand, two hundred eighteen".