2171435647 has 2 divisors, whose sum is σ = 2171435648. Its totient is φ = 2171435646.

The previous prime is 2171435611. The next prime is 2171435657. The reversal of 2171435647 is 7465341712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2171435647 - 2¹⁹ = 2170911359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171435657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085717823 + 1085717824.

It is an arithmetic number, because the mean of its divisors is an integer number (1085717824).

Almost surely, 2^2171435647 is an apocalyptic number.

2171435647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171435647 is an equidigital number, since it uses as much as digits as its factorization.

2171435647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 2171435647 is about 46598.6657212414. The cubic root of 2171435647 is about 1294.9380365198.

The spelling of 2171435647 in words is "two billion, one hundred seventy-one million, four hundred thirty-five thousand, six hundred forty-seven".