205540222 has 4 divisors (see below), whose sum is σ = 308310336. Its totient is φ = 102770110.

The previous prime is 205540207. The next prime is 205540267. The reversal of 205540222 is 222045502.

It is a happy number.

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

It is a super-3 number, since 3×205540222³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 205540193 and 205540202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51385054 + ... + 51385057.

It is an arithmetic number, because the mean of its divisors is an integer number (77077584).

Almost surely, 2^205540222 is an apocalyptic number.

205540222 is a deficient number, since it is larger than the sum of its proper divisors (102770114).

205540222 is a wasteful number, since it uses less digits than its factorization.

205540222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102770113.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 205540222 is about 14336.6740215435. The cubic root of 205540222 is about 590.1543424611.

Adding to 205540222 its reverse (222045502), we get a palindrome (427585724).

The spelling of 205540222 in words is "two hundred five million, five hundred forty thousand, two hundred twenty-two".