223735661 has 4 divisors (see below), whose sum is σ = 223827552. Its totient is φ = 223643772.

The previous prime is 223735619. The next prime is 223735669. The reversal of 223735661 is 166537322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223735661 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 (223735669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42191 + ... + 47196.

It is an arithmetic number, because the mean of its divisors is an integer number (55956888).

Almost surely, 2^223735661 is an apocalyptic number.

It is an amenable number.

223735661 is a deficient number, since it is larger than the sum of its proper divisors (91891).

223735661 is an equidigital number, since it uses as much as digits as its factorization.

223735661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91890.

The product of its digits is 45360, while the sum is 35.

The square root of 223735661 is about 14957.7959940628. The cubic root of 223735661 is about 607.0788048375.

The spelling of 223735661 in words is "two hundred twenty-three million, seven hundred thirty-five thousand, six hundred sixty-one".