223436681 has 4 divisors (see below), whose sum is σ = 240624132. Its totient is φ = 206249232.

The previous prime is 223436671. The next prime is 223436693. The reversal of 223436681 is 186634322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91393600 + 132043081 = 9560^2 + 11491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223436681 is a prime.

It is a super-2 number, since 2×223436681² = 99847900832591522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223436611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8593706 + ... + 8593731.

It is an arithmetic number, because the mean of its divisors is an integer number (60156033).

Almost surely, 2^223436681 is an apocalyptic number.

It is an amenable number.

223436681 is a deficient number, since it is larger than the sum of its proper divisors (17187451).

223436681 is a wasteful number, since it uses less digits than its factorization.

223436681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17187450.

The product of its digits is 41472, while the sum is 35.

The square root of 223436681 is about 14947.7985335634. The cubic root of 223436681 is about 606.8082693180.

The spelling of 223436681 in words is "two hundred twenty-three million, four hundred thirty-six thousand, six hundred eighty-one".