223535681 has 2 divisors, whose sum is σ = 223535682. Its totient is φ = 223535680.

The previous prime is 223535677. The next prime is 223535687. The reversal of 223535681 is 186535322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221533456 + 2002225 = 14884^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 223535681 - 2² = 223535677 is a prime.

It is a super-2 number, since 2×223535681² = 99936401360267522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (223535687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111767840 + 111767841.

It is an arithmetic number, because the mean of its divisors is an integer number (111767841).

Almost surely, 2^223535681 is an apocalyptic number.

It is an amenable number.

223535681 is a deficient number, since it is larger than the sum of its proper divisors (1).

223535681 is an equidigital number, since it uses as much as digits as its factorization.

223535681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 35.

The square root of 223535681 is about 14951.1096912570. The cubic root of 223535681 is about 606.8978773270.

The spelling of 223535681 in words is "two hundred twenty-three million, five hundred thirty-five thousand, six hundred eighty-one".