2171000853 has 16 divisors (see below), whose sum is σ = 3675768960. Its totient is φ = 1240571808.

The previous prime is 2171000791. The next prime is 2171000879. The reversal of 2171000853 is 3580001712.

It is not a de Polignac number, because 2171000853 - 2⁸ = 2171000597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171000653) 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 15 ways as a sum of consecutive naturals, for example, 5743200 + ... + 5743577.

It is an arithmetic number, because the mean of its divisors is an integer number (229735560).

Almost surely, 2^2171000853 is an apocalyptic number.

It is an amenable number.

2171000853 is a deficient number, since it is larger than the sum of its proper divisors (1504768107).

2171000853 is a wasteful number, since it uses less digits than its factorization.

2171000853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11486793 (or 11486787 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 2171000853 is about 46594.0001824269. Note that the first 3 decimals coincide. The cubic root of 2171000853 is about 1294.8516007904.

The spelling of 2171000853 in words is "two billion, one hundred seventy-one million, eight hundred fifty-three", and thus it is an aban number.