7221901885 has 16 divisors (see below), whose sum is σ = 9560358720. Its totient is φ = 5193274240.

The previous prime is 7221901873. The next prime is 7221901891. The reversal of 7221901885 is 5881091227.

It is a happy number.

It is not a de Polignac number, because 7221901885 - 2²³ = 7213513277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732787 + ... + 742576.

It is an arithmetic number, because the mean of its divisors is an integer number (597522420).

Almost surely, 2^7221901885 is an apocalyptic number.

It is an amenable number.

7221901885 is a deficient number, since it is larger than the sum of its proper divisors (2338456835).

7221901885 is a wasteful number, since it uses less digits than its factorization.

7221901885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475468.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 7221901885 is about 84981.7738400417. The cubic root of 7221901885 is about 1932.9347536608.

The spelling of 7221901885 in words is "seven billion, two hundred twenty-one million, nine hundred one thousand, eight hundred eighty-five".