8521247475 has 36 divisors (see below), whose sum is σ = 16436545216. Its totient is φ = 4195074240.

The previous prime is 8521247473. The next prime is 8521247477. The reversal of 8521247475 is 5747421258.

8521247475 is a `hidden beast` number, since 8 + 52 + 124 + 7 + 475 = 666.

It is an interprime number because it is at equal distance from previous prime (8521247473) and next prime (8521247477).

It is not a de Polignac number, because 8521247475 - 2¹ = 8521247473 is a prime.

It is a super-2 number, since 2×8521247475² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8521247475.

It is not an unprimeable number, because it can be changed into a prime (8521247473) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1453699 + ... + 1459548.

Almost surely, 2^8521247475 is an apocalyptic number.

8521247475 is a deficient number, since it is larger than the sum of its proper divisors (7915297741).

8521247475 is a wasteful number, since it uses less digits than its factorization.

8521247475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2913276 (or 2913268 counting only the distinct ones).

The product of its digits is 627200, while the sum is 45.

The square root of 8521247475 is about 92310.6032641971. The cubic root of 8521247475 is about 2042.5266235624.

The spelling of 8521247475 in words is "eight billion, five hundred twenty-one million, two hundred forty-seven thousand, four hundred seventy-five".