8915077221 has 12 divisors (see below), whose sum is σ = 12216722112. Its totient is φ = 5782750128.

The previous prime is 8915077207. The next prime is 8915077277. The reversal of 8915077221 is 1227705198.

It is not a de Polignac number, because 8915077221 - 2⁵ = 8915077189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8915077121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081245 + ... + 1089458.

It is an arithmetic number, because the mean of its divisors is an integer number (1018060176).

Almost surely, 2^8915077221 is an apocalyptic number.

It is an amenable number.

8915077221 is a deficient number, since it is larger than the sum of its proper divisors (3301644891).

8915077221 is a wasteful number, since it uses less digits than its factorization.

8915077221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170780 (or 2170743 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 8915077221 is about 94419.6866177811. The cubic root of 8915077221 is about 2073.5206736465.

The spelling of 8915077221 in words is "eight billion, nine hundred fifteen million, seventy-seven thousand, two hundred twenty-one".