42188117 has 8 divisors (see below), whose sum is σ = 44563200. Its totient is φ = 39876480.

The previous prime is 42188051. The next prime is 42188131. The reversal of 42188117 is 71188124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-42188117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42188147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14492 + ... + 17157.

It is an arithmetic number, because the mean of its divisors is an integer number (5570400).

Almost surely, 2^42188117 is an apocalyptic number.

It is an amenable number.

42188117 is a deficient number, since it is larger than the sum of its proper divisors (2375083).

42188117 is a wasteful number, since it uses less digits than its factorization.

42188117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31723.

The product of its digits is 3584, while the sum is 32.

The square root of 42188117 is about 6495.2380248918. The cubic root of 42188117 is about 348.1208596151.

The spelling of 42188117 in words is "forty-two million, one hundred eighty-eight thousand, one hundred seventeen".