223420423 has 4 divisors (see below), whose sum is σ = 223905528. Its totient is φ = 222935320.

The previous prime is 223420363. The next prime is 223420447. The reversal of 223420423 is 324024322.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223420423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223420394 and 223420403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223420523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241861 + ... + 242782.

It is an arithmetic number, because the mean of its divisors is an integer number (55976382).

Almost surely, 2^223420423 is an apocalyptic number.

223420423 is a deficient number, since it is larger than the sum of its proper divisors (485105).

223420423 is an equidigital number, since it uses as much as digits as its factorization.

223420423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485104.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 223420423 is about 14947.2546977698. The cubic root of 223420423 is about 606.7935511615.

Adding to 223420423 its reverse (324024322), we get a palindrome (547444745).

The spelling of 223420423 in words is "two hundred twenty-three million, four hundred twenty thousand, four hundred twenty-three".