2171671147 has 4 divisors (see below), whose sum is σ = 2175570576. Its totient is φ = 2167771720.

The previous prime is 2171671129. The next prime is 2171671153. The reversal of 2171671147 is 7411761712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171671147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171681147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1948879 + ... + 1949992.

It is an arithmetic number, because the mean of its divisors is an integer number (543892644).

Almost surely, 2^2171671147 is an apocalyptic number.

2171671147 is a deficient number, since it is larger than the sum of its proper divisors (3899429).

2171671147 is an equidigital number, since it uses as much as digits as its factorization.

2171671147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3899428.

The product of its digits is 16464, while the sum is 37.

The square root of 2171671147 is about 46601.1925491183. The cubic root of 2171671147 is about 1294.9848483889.

The spelling of 2171671147 in words is "two billion, one hundred seventy-one million, six hundred seventy-one thousand, one hundred forty-seven".