205906222 has 8 divisors (see below), whose sum is σ = 309573936. Its totient is φ = 102714912.

The previous prime is 205906117. The next prime is 205906241. The reversal of 205906222 is 222609502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×205906222³ (a number of 26 digits) contains 333 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 118018 + ... + 119749.

It is an arithmetic number, because the mean of its divisors is an integer number (38696742).

Almost surely, 2^205906222 is an apocalyptic number.

205906222 is a deficient number, since it is larger than the sum of its proper divisors (103667714).

205906222 is a wasteful number, since it uses less digits than its factorization.

205906222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238202.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 205906222 is about 14349.4328110905. The cubic root of 205906222 is about 590.5044254562.

The spelling of 205906222 in words is "two hundred five million, nine hundred six thousand, two hundred twenty-two".