223445 has 16 divisors (see below), whose sum is σ = 293760. Its totient is φ = 162624.

The previous prime is 223441. The next prime is 223463. The reversal of 223445 is 544322.

It is a cyclic number.

It is not a de Polignac number, because 223445 - 2² = 223441 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3302 + ... + 3368.

It is an arithmetic number, because the mean of its divisors is an integer number (18360).

2²²³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

223445 is a deficient number, since it is larger than the sum of its proper divisors (70315).

223445 is a wasteful number, since it uses less digits than its factorization.

223445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124.

The product of its digits is 960, while the sum is 20.

The square root of 223445 is about 472.6996932514. The cubic root of 223445 is about 60.6815800125.

Adding to 223445 its reverse (544322), we get a palindrome (767767).

It can be divided in two parts, 223 and 445, that multiplied together give a triangular number (99235 = T₄₄₅).

The spelling of 223445 in words is "two hundred twenty-three thousand, four hundred forty-five".