7221515873 has 32 divisors (see below), whose sum is σ = 8985295872. Its totient is φ = 5709844800.

The previous prime is 7221515863. The next prime is 7221515879. The reversal of 7221515873 is 3785151227.

It is not a de Polignac number, because 7221515873 - 2⁶ = 7221515809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7221515873.

It is not an unprimeable number, because it can be changed into a prime (7221515879) 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 31 ways as a sum of consecutive naturals, for example, 203978 + ... + 236748.

It is an arithmetic number, because the mean of its divisors is an integer number (280790496).

Almost surely, 2^7221515873 is an apocalyptic number.

It is an amenable number.

7221515873 is a deficient number, since it is larger than the sum of its proper divisors (1763779999).

7221515873 is a wasteful number, since it uses less digits than its factorization.

7221515873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32885.

The product of its digits is 117600, while the sum is 41.

The square root of 7221515873 is about 84979.5026638777. The cubic root of 7221515873 is about 1932.9003144730.

It can be divided in two parts, 72215 and 15873, that added together give a palindrome (88088).

The spelling of 7221515873 in words is "seven billion, two hundred twenty-one million, five hundred fifteen thousand, eight hundred seventy-three".