2528278281 has 12 divisors (see below), whose sum is σ = 3680714752. Its totient is φ = 1672246296.

The previous prime is 2528278279. The next prime is 2528278303. The reversal of 2528278281 is 1828728252.

2528278281 is a `hidden beast` number, since 25 + 282 + 78 + 281 = 666.

2528278281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2528278281 - 2¹ = 2528278279 is a prime.

It is a super-2 number, since 2×2528278281² = 12784382132352629922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2528278211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1104841 + ... + 1107126.

Almost surely, 2^2528278281 is an apocalyptic number.

It is an amenable number.

2528278281 is a deficient number, since it is larger than the sum of its proper divisors (1152436471).

2528278281 is a wasteful number, since it uses less digits than its factorization.

2528278281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212100 (or 2212097 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 2528278281 is about 50281.9876397105. The cubic root of 2528278281 is about 1362.3069052284.

The spelling of 2528278281 in words is "two billion, five hundred twenty-eight million, two hundred seventy-eight thousand, two hundred eighty-one".