8421475215 has 16 divisors (see below), whose sum is σ = 14266970208. Its totient is φ = 4227250176.

The previous prime is 8421475211. The next prime is 8421475219. The reversal of 8421475215 is 5125741248.

It is an interprime number because it is at equal distance from previous prime (8421475211) and next prime (8421475219).

It is not a de Polignac number, because 8421475215 - 2² = 8421475211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421475211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16512442 + ... + 16512951.

It is an arithmetic number, because the mean of its divisors is an integer number (891685638).

Almost surely, 2^8421475215 is an apocalyptic number.

8421475215 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

8421475215 is a deficient number, since it is larger than the sum of its proper divisors (5845494993).

8421475215 is a wasteful number, since it uses less digits than its factorization.

8421475215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33025418.

The product of its digits is 89600, while the sum is 39.

The square root of 8421475215 is about 91768.5960173740. The cubic root of 8421475215 is about 2034.5235672493.

It can be divided in two parts, 8421 and 475215, that added together give a triangular number (483636 = T₉₈₃).

The spelling of 8421475215 in words is "eight billion, four hundred twenty-one million, four hundred seventy-five thousand, two hundred fifteen".