2528603281 has 4 divisors (see below), whose sum is σ = 2532429364. Its totient is φ = 2524777200.

The previous prime is 2528603237. The next prime is 2528603303. The reversal of 2528603281 is 1823068252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1083463056 + 1445140225 = 32916^2 + 38015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528603281 - 2²⁵ = 2495048849 is a prime.

It is a super-2 number, since 2×2528603281² = 12787669105367929922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2528603281.

It is not an unprimeable number, because it can be changed into a prime (2528606281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1912050 + ... + 1913371.

It is an arithmetic number, because the mean of its divisors is an integer number (633107341).

Almost surely, 2^2528603281 is an apocalyptic number.

It is an amenable number.

2528603281 is a deficient number, since it is larger than the sum of its proper divisors (3826083).

2528603281 is an equidigital number, since it uses as much as digits as its factorization.

2528603281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826082.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 2528603281 is about 50285.2193094551. The cubic root of 2528603281 is about 1362.3652757511.

The spelling of 2528603281 in words is "two billion, five hundred twenty-eight million, six hundred three thousand, two hundred eighty-one".