2128498259 has 4 divisors (see below), whose sum is σ = 2173785504. Its totient is φ = 2083211016.

The previous prime is 2128498213. The next prime is 2128498327. The reversal of 2128498259 is 9528948212.

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 2128498259 - 2⁸ = 2128498003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128498759) 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, 22643552 + ... + 22643645.

It is an arithmetic number, because the mean of its divisors is an integer number (543446376).

Almost surely, 2^2128498259 is an apocalyptic number.

2128498259 is a deficient number, since it is larger than the sum of its proper divisors (45287245).

2128498259 is an equidigital number, since it uses as much as digits as its factorization.

2128498259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45287244.

The product of its digits is 829440, while the sum is 50.

The square root of 2128498259 is about 46135.6506294211. The cubic root of 2128498259 is about 1286.3458994464.

The spelling of 2128498259 in words is "two billion, one hundred twenty-eight million, four hundred ninety-eight thousand, two hundred fifty-nine".