2117171026 has 16 divisors (see below), whose sum is σ = 3369231360. Its totient is φ = 994971600.

The previous prime is 2117171003. The next prime is 2117171027. The reversal of 2117171026 is 6201717112.

It is a junction number, because it is equal to n+sod(n) for n = 2117170985 and 2117171003.

It is not an unprimeable number, because it can be changed into a prime (2117171027) 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, 214525 + ... + 224176.

It is an arithmetic number, because the mean of its divisors is an integer number (210576960).

Almost surely, 2^2117171026 is an apocalyptic number.

2117171026 is a deficient number, since it is larger than the sum of its proper divisors (1252060334).

2117171026 is a wasteful number, since it uses less digits than its factorization.

2117171026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438849.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 2117171026 is about 46012.7267829239. The cubic root of 2117171026 is about 1284.0599899023.

Adding to 2117171026 its reverse (6201717112), we get a palindrome (8318888138).

The spelling of 2117171026 in words is "two billion, one hundred seventeen million, one hundred seventy-one thousand, twenty-six".