2717171981 has 4 divisors (see below), whose sum is σ = 2717375232. Its totient is φ = 2716968732.

The previous prime is 2717171971. The next prime is 2717172011. The reversal of 2717171981 is 1891717172.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2717171981 - 2¹⁰ = 2717170957 is a prime.

It is a super-2 number, since 2×2717171981² = 14766047148662928722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2717171971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80045 + ... + 108818.

It is an arithmetic number, because the mean of its divisors is an integer number (679343808).

Almost surely, 2^2717171981 is an apocalyptic number.

It is an amenable number.

2717171981 is a deficient number, since it is larger than the sum of its proper divisors (203251).

2717171981 is a wasteful number, since it uses less digits than its factorization.

2717171981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203250.

The product of its digits is 49392, while the sum is 44.

The square root of 2717171981 is about 52126.4997961689. The cubic root of 2717171981 is about 1395.4224610019.

The spelling of 2717171981 in words is "two billion, seven hundred seventeen million, one hundred seventy-one thousand, nine hundred eighty-one".