7221500715865 has 8 divisors (see below), whose sum is σ = 8665819585920. Its totient is φ = 5777188088112.

The previous prime is 7221500715757. The next prime is 7221500715881. The reversal of 7221500715865 is 5685170051227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7221500715865 - 2²¹ = 7221498618713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547142 + ... + 4103248.

It is an arithmetic number, because the mean of its divisors is an integer number (1083227448240).

Almost surely, 2^{7221500715865} is an apocalyptic number.

It is an amenable number.

7221500715865 is a deficient number, since it is larger than the sum of its proper divisors (1444318870055).

7221500715865 is a wasteful number, since it uses less digits than its factorization.

7221500715865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121151.

The product of its (nonzero) digits is 1176000, while the sum is 49.

The spelling of 7221500715865 in words is "seven trillion, two hundred twenty-one billion, five hundred million, seven hundred fifteen thousand, eight hundred sixty-five".