8524867221 has 16 divisors (see below), whose sum is σ = 13600928320. Its totient is φ = 5246071920.

The previous prime is 8524867201. The next prime is 8524867259. The reversal of 8524867221 is 1227684258.

8524867221 is a `hidden beast` number, since 85 + 2 + 486 + 72 + 21 = 666.

It is not a de Polignac number, because 8524867221 - 2⁷ = 8524867093 is a prime.

It is a super-2 number, since 2×8524867221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8524867201) 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 15 ways as a sum of consecutive naturals, for example, 12143335 + ... + 12144036.

It is an arithmetic number, because the mean of its divisors is an integer number (850058020).

Almost surely, 2^8524867221 is an apocalyptic number.

It is an amenable number.

8524867221 is a deficient number, since it is larger than the sum of its proper divisors (5076061099).

8524867221 is a wasteful number, since it uses less digits than its factorization.

8524867221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24287393 (or 24287387 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 8524867221 is about 92330.2075216990. The cubic root of 8524867221 is about 2042.8157980038.

The spelling of 8524867221 in words is "eight billion, five hundred twenty-four million, eight hundred sixty-seven thousand, two hundred twenty-one".