223856665 has 8 divisors (see below), whose sum is σ = 269025408. Its totient is φ = 178820400.

The previous prime is 223856621. The next prime is 223856671. The reversal of 223856665 is 566658322.

It is a happy number.

223856665 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 de Polignac number, because none of the positive numbers 2^k-223856665 is a prime.

It is a super-2 number, since 2×223856665² = 100223612929844450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29361 + ... + 36190.

It is an arithmetic number, because the mean of its divisors is an integer number (33628176).

Almost surely, 2^223856665 is an apocalyptic number.

It is an amenable number.

223856665 is a deficient number, since it is larger than the sum of its proper divisors (45168743).

223856665 is an equidigital number, since it uses as much as digits as its factorization.

223856665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66239.

The product of its digits is 518400, while the sum is 43.

The square root of 223856665 is about 14961.8402945627. The cubic root of 223856665 is about 607.1882281994.

The spelling of 223856665 in words is "two hundred twenty-three million, eight hundred fifty-six thousand, six hundred sixty-five".