2170271681 has 4 divisors (see below), whose sum is σ = 2170436352. Its totient is φ = 2170107012.

The previous prime is 2170271669. The next prime is 2170271699. The reversal of 2170271681 is 1861720712.

2170271681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2170271681 - 2¹⁸ = 2170009537 is a prime.

It is a super-2 number, since 2×2170271681² = 9420158338701131522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2170271611) 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, 60665 + ... + 89558.

It is an arithmetic number, because the mean of its divisors is an integer number (542609088).

Almost surely, 2^2170271681 is an apocalyptic number.

It is an amenable number.

2170271681 is a deficient number, since it is larger than the sum of its proper divisors (164671).

2170271681 is a wasteful number, since it uses less digits than its factorization.

2170271681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164670.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 2170271681 is about 46586.1747839421. The cubic root of 2170271681 is about 1294.7066176972.

The spelling of 2170271681 in words is "two billion, one hundred seventy million, two hundred seventy-one thousand, six hundred eighty-one".