2143128239 has 48 divisors (see below), whose sum is σ = 2748038400. Its totient is φ = 1658926080.

The previous prime is 2143128227. The next prime is 2143128241. The reversal of 2143128239 is 9328213412.

It is a happy number.

It is not a de Polignac number, because 2143128239 - 2⁸ = 2143127983 is a prime.

It is a super-2 number, since 2×2143128239² = 9185997297598482242, which contains 22 as substring.

Its product of digits (20736) is a multiple of the sum of its prime factors (768).

It is a junction number, because it is equal to n+sod(n) for n = 2143128199 and 2143128208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143128209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3847349 + ... + 3847905.

It is an arithmetic number, because the mean of its divisors is an integer number (57250800).

Almost surely, 2^2143128239 is an apocalyptic number.

2143128239 is a deficient number, since it is larger than the sum of its proper divisors (604910161).

2143128239 is a wasteful number, since it uses less digits than its factorization.

2143128239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768 (or 761 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 2143128239 is about 46293.9330690318. The cubic root of 2143128239 is about 1289.2863546687.

The spelling of 2143128239 in words is "two billion, one hundred forty-three million, one hundred twenty-eight thousand, two hundred thirty-nine".