223145665 has 8 divisors (see below), whose sum is σ = 269121600. Its totient is φ = 177618672.

The previous prime is 223145641. The next prime is 223145683. The reversal of 223145665 is 566541322.

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 223145665 - 2¹⁷ = 223014593 is a prime.

It is a super-3 number, since 3×223145665³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 223145665.

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, 111139 + ... + 113128.

It is an arithmetic number, because the mean of its divisors is an integer number (33640200).

Almost surely, 2^223145665 is an apocalyptic number.

It is an amenable number.

223145665 is a deficient number, since it is larger than the sum of its proper divisors (45975935).

223145665 is a wasteful number, since it uses less digits than its factorization.

223145665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224471.

The product of its digits is 43200, while the sum is 34.

The square root of 223145665 is about 14938.0609518103. The cubic root of 223145665 is about 606.5447082393.

Adding to 223145665 its reverse (566541322), we get a palindrome (789686987).

The spelling of 223145665 in words is "two hundred twenty-three million, one hundred forty-five thousand, six hundred sixty-five".