223423645 has 4 divisors (see below), whose sum is σ = 268108380. Its totient is φ = 178738912.

The previous prime is 223423631. The next prime is 223423667. The reversal of 223423645 is 546324322.

223423645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169885156 + 53538489 = 13034^2 + 7317^2 .

It is a cyclic number.

It is not a de Polignac number, because 223423645 - 2¹⁹ = 222899357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22342360 + ... + 22342369.

It is an arithmetic number, because the mean of its divisors is an integer number (67027095).

Almost surely, 2^223423645 is an apocalyptic number.

It is an amenable number.

223423645 is a deficient number, since it is larger than the sum of its proper divisors (44684735).

223423645 is an equidigital number, since it uses as much as digits as its factorization.

223423645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44684734.

The product of its digits is 34560, while the sum is 31.

The square root of 223423645 is about 14947.3624763702. The cubic root of 223423645 is about 606.7964680531.

Adding to 223423645 its reverse (546324322), we get a palindrome (769747967).

The spelling of 223423645 in words is "two hundred twenty-three million, four hundred twenty-three thousand, six hundred forty-five".