2143888899 has 4 divisors (see below), whose sum is σ = 2858518536. Its totient is φ = 1429259264.

The previous prime is 2143888897. The next prime is 2143888909. The reversal of 2143888899 is 9988883412.

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

It is a cyclic number.

It is not a de Polignac number, because 2143888899 - 2¹ = 2143888897 is a prime.

It is a super-2 number, since 2×2143888899² = 9192519222510864402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2143888897) 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, 357314814 + ... + 357314819.

It is an arithmetic number, because the mean of its divisors is an integer number (714629634).

Almost surely, 2^2143888899 is an apocalyptic number.

2143888899 is a deficient number, since it is larger than the sum of its proper divisors (714629637).

2143888899 is an equidigital number, since it uses as much as digits as its factorization.

2143888899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714629636.

The product of its digits is 7962624, while the sum is 60.

The square root of 2143888899 is about 46302.1478875441. The cubic root of 2143888899 is about 1289.4388719930.

The spelling of 2143888899 in words is "two billion, one hundred forty-three million, eight hundred eighty-eight thousand, eight hundred ninety-nine".