7221530865 has 16 divisors (see below), whose sum is σ = 11555526528. Its totient is φ = 3851124096.

The previous prime is 7221530851. The next prime is 7221530867. The reversal of 7221530865 is 5680351227.

It is not a de Polignac number, because 7221530865 - 2⁷ = 7221530737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7221530867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252484 + ... + 279626.

It is an arithmetic number, because the mean of its divisors is an integer number (722220408).

Almost surely, 2^7221530865 is an apocalyptic number.

It is an amenable number.

7221530865 is a deficient number, since it is larger than the sum of its proper divisors (4333995663).

7221530865 is a wasteful number, since it uses less digits than its factorization.

7221530865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44888.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 7221530865 is about 84979.5908733385. The cubic root of 7221530865 is about 1932.9016520510.

The spelling of 7221530865 in words is "seven billion, two hundred twenty-one million, five hundred thirty thousand, eight hundred sixty-five".