223145 has 8 divisors (see below), whose sum is σ = 288456. Its totient is φ = 164736.

The previous prime is 223133. The next prime is 223151. The reversal of 223145 is 541322.

It can be written as a sum of positive squares in 4 ways, for example, as 361 + 222784 = 19^2 + 472^2 .

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

It is not a de Polignac number, because 223145 - 2⁴ = 223129 is a prime.

It is a super-3 number, since 3×223145³ = 33333639551320875, which contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (36057).

2²²³¹⁴⁵ is an apocalyptic number.

It is an amenable number.

223145 is a deficient number, since it is larger than the sum of its proper divisors (65311).

223145 is a wasteful number, since it uses less digits than its factorization.

223145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451.

The product of its digits is 240, while the sum is 17.

The square root of 223145 is about 472.3822604629. The cubic root of 223145 is about 60.6544105714.

Adding to 223145 its reverse (541322), we get a palindrome (764467).

The spelling of 223145 in words is "two hundred twenty-three thousand, one hundred forty-five".