7221421306 has 16 divisors (see below), whose sum is σ = 11820171168. Its totient is φ = 3281547600.

The previous prime is 7221421253. The next prime is 7221421327. The reversal of 7221421306 is 6031241227.

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, 38161 + ... + 126091.

It is an arithmetic number, because the mean of its divisors is an integer number (738760698).

Almost surely, 2^7221421306 is an apocalyptic number.

7221421306 is a deficient number, since it is larger than the sum of its proper divisors (4598749862).

7221421306 is a wasteful number, since it uses less digits than its factorization.

7221421306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91677.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 7221421306 is about 84978.9462514098. The cubic root of 7221421306 is about 1932.8918772148.

The spelling of 7221421306 in words is "seven billion, two hundred twenty-one million, four hundred twenty-one thousand, three hundred six".