7213778106 has 16 divisors (see below), whose sum is σ = 14478540384. Its totient is φ = 2396095344.

The previous prime is 7213778071. The next prime is 7213778123. The reversal of 7213778106 is 6018773127.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2122501 + ... + 2125896.

It is an arithmetic number, because the mean of its divisors is an integer number (904908774).

Almost surely, 2^7213778106 is an apocalyptic number.

7213778106 is an abundant number, since it is smaller than the sum of its proper divisors (7264762278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7213778106 is a wasteful number, since it uses less digits than its factorization.

7213778106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248685.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 7213778106 is about 84933.9632067173. The cubic root of 7213778106 is about 1932.2097079782.

The spelling of 7213778106 in words is "seven billion, two hundred thirteen million, seven hundred seventy-eight thousand, one hundred six".