445345223 has 4 divisors (see below), whose sum is σ = 445542240. Its totient is φ = 445148208.

The previous prime is 445345213. The next prime is 445345247. The reversal of 445345223 is 322543544.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 445345223 - 2²⁰ = 444296647 is a prime.

It is a super-4 number, since 4×445345223⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445345223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445345213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95078 + ... + 99651.

It is an arithmetic number, because the mean of its divisors is an integer number (111385560).

Almost surely, 2^445345223 is an apocalyptic number.

445345223 is a deficient number, since it is larger than the sum of its proper divisors (197017).

445345223 is a wasteful number, since it uses less digits than its factorization.

445345223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197016.

The product of its digits is 57600, while the sum is 32.

The square root of 445345223 is about 21103.2040932177. The cubic root of 445345223 is about 763.6580474727.

Adding to 445345223 its reverse (322543544), we get a palindrome (767888767).

The spelling of 445345223 in words is "four hundred forty-five million, three hundred forty-five thousand, two hundred twenty-three".