406205223 has 4 divisors (see below), whose sum is σ = 541606968. Its totient is φ = 270803480.

The previous prime is 406205213. The next prime is 406205249. The reversal of 406205223 is 322502604.

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 406205223 - 2⁴ = 406205207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 406205193 and 406205202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406205213) 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, 67700868 + ... + 67700873.

It is an arithmetic number, because the mean of its divisors is an integer number (135401742).

Almost surely, 2^406205223 is an apocalyptic number.

406205223 is a deficient number, since it is larger than the sum of its proper divisors (135401745).

406205223 is a wasteful number, since it uses less digits than its factorization.

406205223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135401744.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 406205223 is about 20154.5335594749. The cubic root of 406205223 is about 740.5968054997.

Adding to 406205223 its reverse (322502604), we get a palindrome (728707827).

The spelling of 406205223 in words is "four hundred six million, two hundred five thousand, two hundred twenty-three".