8889215481 has 10 divisors (see below), whose sum is σ = 13278951642. Its totient is φ = 5926143600.

The previous prime is 8889215473. The next prime is 8889215501. The reversal of 8889215481 is 1845129888.

8889215481 is a `hidden beast` number, since 8 + 8 + 8 + 92 + 1 + 548 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5546525625 + 3342689856 = 74475^2 + 57816^2 .

It is not a de Polignac number, because 8889215481 - 2³ = 8889215473 is a prime.

It is a super-2 number, since 2×8889215481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8889215281) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 54871620 + ... + 54871781.

Almost surely, 2^8889215481 is an apocalyptic number.

8889215481 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8889215481 is a deficient number, since it is larger than the sum of its proper divisors (4389736161).

8889215481 is a wasteful number, since it uses less digits than its factorization.

8889215481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109743413 (or 109743404 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 54.

The square root of 8889215481 is about 94282.6361585207. The cubic root of 8889215481 is about 2071.5137069325.

The spelling of 8889215481 in words is "eight billion, eight hundred eighty-nine million, two hundred fifteen thousand, four hundred eighty-one".