205223331 has 4 divisors (see below), whose sum is σ = 273631112. Its totient is φ = 136815552.

The previous prime is 205223297. The next prime is 205223339. The reversal of 205223331 is 133322502.

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

It is not a de Polignac number, because 205223331 - 2⁷ = 205223203 is a prime.

It is a super-2 number, since 2×205223331² = 84233231173471122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205223298 and 205223307.

It is not an unprimeable number, because it can be changed into a prime (205223339) 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, 34203886 + ... + 34203891.

It is an arithmetic number, because the mean of its divisors is an integer number (68407778).

Almost surely, 2^205223331 is an apocalyptic number.

205223331 is a deficient number, since it is larger than the sum of its proper divisors (68407781).

205223331 is an equidigital number, since it uses as much as digits as its factorization.

205223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68407780.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 205223331 is about 14325.6179971406. The cubic root of 205223331 is about 589.8508969196.

Adding to 205223331 its reverse (133322502), we get a palindrome (338545833).

The spelling of 205223331 in words is "two hundred five million, two hundred twenty-three thousand, three hundred thirty-one".