7221565992 has 64 divisors (see below), whose sum is σ = 18168353280. Its totient is φ = 2391973632.

The previous prime is 7221565969. The next prime is 7221566021. The reversal of 7221565992 is 2995651227.

It is a happy 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, 4264698 + ... + 4266390.

It is an arithmetic number, because the mean of its divisors is an integer number (283880520).

Almost surely, 2^7221565992 is an apocalyptic number.

It is an amenable number.

7221565992 is an abundant number, since it is smaller than the sum of its proper divisors (10946787288).

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

7221565992 is a wasteful number, since it uses less digits than its factorization.

7221565992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722 (or 2718 counting only the distinct ones).

The product of its digits is 680400, while the sum is 48.

The square root of 7221565992 is about 84979.7975521241. The cubic root of 7221565992 is about 1932.9047860553.

The spelling of 7221565992 in words is "seven billion, two hundred twenty-one million, five hundred sixty-five thousand, nine hundred ninety-two".