7221909852 has 36 divisors (see below), whose sum is σ = 18291294840. Its totient is φ = 2402567712.

The previous prime is 7221909841. The next prime is 7221909853. The reversal of 7221909852 is 2589091227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 7221909798 and 7221909807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221909853) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 178738 + ... + 215385.

Almost surely, 2^7221909852 is an apocalyptic number.

It is an amenable number.

7221909852 is an abundant number, since it is smaller than the sum of its proper divisors (11069384988).

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

7221909852 is a wasteful number, since it uses less digits than its factorization.

7221909852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394642 (or 394637 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 7221909852 is about 84981.8207147858. The cubic root of 7221909852 is about 1932.9354644470.

The spelling of 7221909852 in words is "seven billion, two hundred twenty-one million, nine hundred nine thousand, eight hundred fifty-two".