2143232985 has 32 divisors (see below), whose sum is σ = 3462681600. Its totient is φ = 1131945408.

The previous prime is 2143232983. The next prime is 2143233007. The reversal of 2143232985 is 5892323412.

It is not a de Polignac number, because 2143232985 - 2¹ = 2143232983 is a prime.

It is a super-4 number, since 4×2143232985⁴ (a number of 38 digits) contains 4444 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2143232983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 676014 + ... + 679176.

It is an arithmetic number, because the mean of its divisors is an integer number (108208800).

Almost surely, 2^2143232985 is an apocalyptic number.

It is an amenable number.

2143232985 is a deficient number, since it is larger than the sum of its proper divisors (1319448615).

2143232985 is a wasteful number, since it uses less digits than its factorization.

2143232985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3597.

The product of its digits is 103680, while the sum is 39.

The square root of 2143232985 is about 46295.0643697576. The cubic root of 2143232985 is about 1289.3073590718.

The spelling of 2143232985 in words is "two billion, one hundred forty-three million, two hundred thirty-two thousand, nine hundred eighty-five".