223998647138 has 18 divisors (see below), whose sum is σ = 390862957761. Its totient is φ = 95997412224.

The previous prime is 223998647137. The next prime is 223998647143. The reversal of 223998647138 is 831746899322.

It can be written as a sum of positive squares in 2 ways, for example, as 163695495649 + 60303151489 = 404593^2 + 245567^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=334663.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223998647137) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4661378 + ... + 4709186.

Almost surely, 2^223998647138 is an apocalyptic number.

223998647138 is a deficient number, since it is larger than the sum of its proper divisors (166864310623).

223998647138 is an frugal number, since it uses more digits than its factorization.

223998647138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95634 (or 47818 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 62.

The spelling of 223998647138 in words is "two hundred twenty-three billion, nine hundred ninety-eight million, six hundred forty-seven thousand, one hundred thirty-eight".