2173187903 has 16 divisors (see below), whose sum is σ = 2262318240. Its totient is φ = 2086041600.

The previous prime is 2173187897. The next prime is 2173187941. The reversal of 2173187903 is 3097813712.

It is a cyclic number.

It is not a de Polignac number, because 2173187903 - 2¹⁴ = 2173171519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173187983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718328 + ... + 721346.

It is an arithmetic number, because the mean of its divisors is an integer number (141394890).

Almost surely, 2^2173187903 is an apocalyptic number.

2173187903 is a deficient number, since it is larger than the sum of its proper divisors (89130337).

2173187903 is a wasteful number, since it uses less digits than its factorization.

2173187903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 2173187903 is about 46617.4634981355. The cubic root of 2173187903 is about 1295.2862627997.

The spelling of 2173187903 in words is "two billion, one hundred seventy-three million, one hundred eighty-seven thousand, nine hundred three".