2128498281 has 24 divisors (see below), whose sum is σ = 3783998400. Its totient is φ = 1122723936.

The previous prime is 2128498213. The next prime is 2128498327. The reversal of 2128498281 is 1828948212.

2128498281 is a `hidden beast` number, since 2 + 1 + 284 + 98 + 281 = 666.

It is not a de Polignac number, because 2128498281 - 2⁷ = 2128498153 is a prime.

It is a super-2 number, since 2×2128498281² = 9061009864439909922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2128498201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1298631 + ... + 1300268.

It is an arithmetic number, because the mean of its divisors is an integer number (157666600).

Almost surely, 2^2128498281 is an apocalyptic number.

2128498281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2128498281 is a deficient number, since it is larger than the sum of its proper divisors (1655500119).

2128498281 is a wasteful number, since it uses less digits than its factorization.

2128498281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598925 (or 2598922 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 2128498281 is about 46135.6508678484. The cubic root of 2128498281 is about 1286.3459038783.

The spelling of 2128498281 in words is "two billion, one hundred twenty-eight million, four hundred ninety-eight thousand, two hundred eighty-one".