646049222 has 24 divisors (see below), whose sum is σ = 1214006976. Its totient is φ = 255579408.

The previous prime is 646049221. The next prime is 646049237. The reversal of 646049222 is 222940646.

646049222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646049221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252278 + ... + 254825.

It is an arithmetic number, because the mean of its divisors is an integer number (50583624).

Almost surely, 2^646049222 is an apocalyptic number.

646049222 is a deficient number, since it is larger than the sum of its proper divisors (567957754).

646049222 is a wasteful number, since it uses less digits than its factorization.

646049222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507132 (or 507125 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 646049222 is about 25417.4983426772. The cubic root of 646049222 is about 864.4805024369.

Adding to 646049222 its reverse (222940646), we get a palindrome (868989868).

The spelling of 646049222 in words is "six hundred forty-six million, forty-nine thousand, two hundred twenty-two".