42817115421 has 24 divisors (see below), whose sum is σ = 62267793120. Its totient is φ = 28350843936.

The previous prime is 42817115293. The next prime is 42817115441. The reversal of 42817115421 is 12451171824.

42817115421 is a `hidden beast` number, since 42 + 8 + 1 + 71 + 1 + 542 + 1 = 666.

42817115421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42817115421 - 2⁷ = 42817115293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42817115441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1573090 + ... + 1600076.

It is an arithmetic number, because the mean of its divisors is an integer number (2594491380).

Almost surely, 2^42817115421 is an apocalyptic number.

It is an amenable number.

42817115421 is a deficient number, since it is larger than the sum of its proper divisors (19450677699).

42817115421 is a wasteful number, since it uses less digits than its factorization.

42817115421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28185 (or 28182 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The spelling of 42817115421 in words is "forty-two billion, eight hundred seventeen million, one hundred fifteen thousand, four hundred twenty-one".