223200661 has 4 divisors (see below), whose sum is σ = 223962732. Its totient is φ = 222438592.

The previous prime is 223200643. The next prime is 223200689. The reversal of 223200661 is 166002322.

It is a happy number.

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 215943025 + 7257636 = 14695^2 + 2694^2 .

It is a cyclic number.

It is not a de Polignac number, because 223200661 - 2⁵ = 223200629 is a prime.

It is a super-3 number, since 3×223200661³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223200631) 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, 380596 + ... + 381181.

It is an arithmetic number, because the mean of its divisors is an integer number (55990683).

Almost surely, 2^223200661 is an apocalyptic number.

It is an amenable number.

223200661 is a deficient number, since it is larger than the sum of its proper divisors (762071).

223200661 is an equidigital number, since it uses as much as digits as its factorization.

223200661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762070.

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

The square root of 223200661 is about 14939.9016395691. The cubic root of 223200661 is about 606.5945333804.

Adding to 223200661 its reverse (166002322), we get a palindrome (389202983).

The spelling of 223200661 in words is "two hundred twenty-three million, two hundred thousand, six hundred sixty-one".