205223403 has 16 divisors (see below), whose sum is σ = 341150976. Its totient is φ = 106609440.

The previous prime is 205223377. The next prime is 205223407. The reversal of 205223403 is 304322502.

It is not a de Polignac number, because 205223403 - 2⁶ = 205223339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 205223403.

It is not an unprimeable number, because it can be changed into a prime (205223407) 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, 443976 + ... + 444437.

It is an arithmetic number, because the mean of its divisors is an integer number (21321936).

Almost surely, 2^205223403 is an apocalyptic number.

205223403 is a deficient number, since it is larger than the sum of its proper divisors (135927573).

205223403 is a wasteful number, since it uses less digits than its factorization.

205223403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888434.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 205223403 is about 14325.6205101210. The cubic root of 205223403 is about 589.8509659002.

Adding to 205223403 its reverse (304322502), we get a palindrome (509545905).

Subtracting 205223403 from its reverse (304322502), we obtain a palindrome (99099099).

The spelling of 205223403 in words is "two hundred five million, two hundred twenty-three thousand, four hundred three".