223197681 has 32 divisors (see below), whose sum is σ = 361635840. Its totient is φ = 119680704.

The previous prime is 223197677. The next prime is 223197683. The reversal of 223197681 is 186791322.

It is not a de Polignac number, because 223197681 - 2² = 223197677 is a prime.

It is a super-3 number, since 3×223197681³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223197683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21240 + ... + 29958.

It is an arithmetic number, because the mean of its divisors is an integer number (11301120).

Almost surely, 2^223197681 is an apocalyptic number.

223197681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

223197681 is a deficient number, since it is larger than the sum of its proper divisors (138438159).

223197681 is a wasteful number, since it uses less digits than its factorization.

223197681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8805.

The product of its digits is 36288, while the sum is 39.

The square root of 223197681 is about 14939.8019063172. The cubic root of 223197681 is about 606.5918337771.

The spelling of 223197681 in words is "two hundred twenty-three million, one hundred ninety-seven thousand, six hundred eighty-one".