205840400222 has 4 divisors (see below), whose sum is σ = 308760600336. Its totient is φ = 102920200110.

The previous prime is 205840400209. The next prime is 205840400299. The reversal of 205840400222 is 222004048502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51460100054 + ... + 51460100057.

It is an arithmetic number, because the mean of its divisors is an integer number (77190150084).

Almost surely, 2^205840400222 is an apocalyptic number.

205840400222 is a deficient number, since it is larger than the sum of its proper divisors (102920200114).

205840400222 is a wasteful number, since it uses less digits than its factorization.

205840400222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102920200113.

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 205840400222 its reverse (222004048502), we get a palindrome (427844448724).

The spelling of 205840400222 in words is "two hundred five billion, eight hundred forty million, four hundred thousand, two hundred twenty-two".