2183717985 has 32 divisors (see below), whose sum is σ = 3637603200. Its totient is φ = 1117628928.

The previous prime is 2183717959. The next prime is 2183717989. The reversal of 2183717985 is 5897173812.

It is not a de Polignac number, because 2183717985 - 2¹³ = 2183709793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2183717989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13566 + ... + 67464.

It is an arithmetic number, because the mean of its divisors is an integer number (113675100).

Almost surely, 2^2183717985 is an apocalyptic number.

It is an amenable number.

2183717985 is a deficient number, since it is larger than the sum of its proper divisors (1453885215).

2183717985 is a wasteful number, since it uses less digits than its factorization.

2183717985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54017.

The product of its digits is 846720, while the sum is 51.

The square root of 2183717985 is about 46730.2684028243. The cubic root of 2183717985 is about 1297.3749761662.

The spelling of 2183717985 in words is "two billion, one hundred eighty-three million, seven hundred seventeen thousand, nine hundred eighty-five".