223020661 has 8 divisors (see below), whose sum is σ = 232515360. Its totient is φ = 213721872.

The previous prime is 223020653. The next prime is 223020683. The reversal of 223020661 is 166020322.

It is a happy number.

223020661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223020661 - 2³ = 223020653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223020631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46651 + ... + 51208.

It is an arithmetic number, because the mean of its divisors is an integer number (29064420).

Almost surely, 2^223020661 is an apocalyptic number.

It is an amenable number.

223020661 is a deficient number, since it is larger than the sum of its proper divisors (9494699).

223020661 is an equidigital number, since it uses as much as digits as its factorization.

223020661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97955.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 223020661 is about 14933.8762884925. The cubic root of 223020661 is about 606.4314269632.

Adding to 223020661 its reverse (166020322), we get a palindrome (389040983).

The spelling of 223020661 in words is "two hundred twenty-three million, twenty thousand, six hundred sixty-one".