223683681 has 24 divisors (see below), whose sum is σ = 325657920. Its totient is φ = 135761184.

The previous prime is 223683673. The next prime is 223683727. The reversal of 223683681 is 186386322.

It is not a de Polignac number, because 223683681 - 2³ = 223683673 is a prime.

It is a super-2 number, since 2×223683681² = 100068778291419522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223683661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242940 + ... + 243858.

It is an arithmetic number, because the mean of its divisors is an integer number (13569080).

Almost surely, 2^223683681 is an apocalyptic number.

It is an amenable number.

223683681 is a deficient number, since it is larger than the sum of its proper divisors (101974239).

223683681 is an equidigital number, since it uses as much as digits as its factorization.

223683681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1014 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 223683681 is about 14956.0583376771. The cubic root of 223683681 is about 607.0317874477.

The spelling of 223683681 in words is "two hundred twenty-three million, six hundred eighty-three thousand, six hundred eighty-one".