8215403913 has 32 divisors (see below), whose sum is σ = 12477041280. Its totient is φ = 5340479040.

The previous prime is 8215403897. The next prime is 8215403921. The reversal of 8215403913 is 3193045128.

8215403913 is a `hidden beast` number, since 8 + 21 + 540 + 3 + 91 + 3 = 666.

8215403913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8215403913 - 2⁴ = 8215403897 is a prime.

It is a super-2 number, since 2×8215403913² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8215404913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215643 + ... + 250863.

It is an arithmetic number, because the mean of its divisors is an integer number (389907540).

Almost surely, 2^8215403913 is an apocalyptic number.

It is an amenable number.

8215403913 is a deficient number, since it is larger than the sum of its proper divisors (4261637367).

8215403913 is a wasteful number, since it uses less digits than its factorization.

8215403913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35446 (or 35440 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 8215403913 is about 90638.8653558726. The cubic root of 8215403913 is about 2017.7915864951.

The spelling of 8215403913 in words is "eight billion, two hundred fifteen million, four hundred three thousand, nine hundred thirteen".