2175164887 has 4 divisors (see below), whose sum is σ = 2485902736. Its totient is φ = 1864427040.

The previous prime is 2175164881. The next prime is 2175164921. The reversal of 2175164887 is 7884615712.

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

It is not a de Polignac number, because 2175164887 - 2¹⁵ = 2175132119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2175164887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2175164881) 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, 155368914 + ... + 155368927.

It is an arithmetic number, because the mean of its divisors is an integer number (621475684).

Almost surely, 2^2175164887 is an apocalyptic number.

2175164887 is a deficient number, since it is larger than the sum of its proper divisors (310737849).

2175164887 is an equidigital number, since it uses as much as digits as its factorization.

2175164887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310737848.

The product of its digits is 752640, while the sum is 49.

The square root of 2175164887 is about 46638.6630061369. The cubic root of 2175164887 is about 1295.6789246712.

The spelling of 2175164887 in words is "two billion, one hundred seventy-five million, one hundred sixty-four thousand, eight hundred eighty-seven".