2117639571 has 8 divisors (see below), whose sum is σ = 2824607184. Its totient is φ = 1411215840.

The previous prime is 2117639569. The next prime is 2117639581. The reversal of 2117639571 is 1759367112.

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

It is not a de Polignac number, because 2117639571 - 2¹ = 2117639569 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2117639501) 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, 126796 + ... + 142521.

It is an arithmetic number, because the mean of its divisors is an integer number (353075898).

Almost surely, 2^2117639571 is an apocalyptic number.

2117639571 is a deficient number, since it is larger than the sum of its proper divisors (706967613).

2117639571 is a wasteful number, since it uses less digits than its factorization.

2117639571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271941.

The product of its digits is 79380, while the sum is 42.

The square root of 2117639571 is about 46017.8179730417. The cubic root of 2117639571 is about 1284.1547067837.

The spelling of 2117639571 in words is "two billion, one hundred seventeen million, six hundred thirty-nine thousand, five hundred seventy-one".