2185172003887 has 16 divisors (see below), whose sum is σ = 2224435752000. Its totient is φ = 2146021194240.

The previous prime is 2185172003869. The next prime is 2185172003899. The reversal of 2185172003887 is 7883002715812.

It is a cyclic number.

It is not a de Polignac number, because 2185172003887 - 2¹⁹ = 2185171479599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185172003087) 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, 189202989 + ... + 189214537.

It is an arithmetic number, because the mean of its divisors is an integer number (139027234500).

Almost surely, 2^{2185172003887} is an apocalyptic number.

2185172003887 is a deficient number, since it is larger than the sum of its proper divisors (39263748113).

2185172003887 is a wasteful number, since it uses less digits than its factorization.

2185172003887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16146.

The product of its (nonzero) digits is 1505280, while the sum is 52.

The spelling of 2185172003887 in words is "two trillion, one hundred eighty-five billion, one hundred seventy-two million, three thousand, eight hundred eighty-seven".