2528530891 has 4 divisors (see below), whose sum is σ = 2534397984. Its totient is φ = 2522663800.

The previous prime is 2528530861. The next prime is 2528530897. The reversal of 2528530891 is 1980358252.

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 2528530891 - 2²³ = 2520142283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2528530897) 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, 2932900 + ... + 2933761.

It is an arithmetic number, because the mean of its divisors is an integer number (633599496).

Almost surely, 2^2528530891 is an apocalyptic number.

2528530891 is a deficient number, since it is larger than the sum of its proper divisors (5867093).

2528530891 is an equidigital number, since it uses as much as digits as its factorization.

2528530891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867092.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 2528530891 is about 50284.4995102865. The cubic root of 2528530891 is about 1362.3522748236.

The spelling of 2528530891 in words is "two billion, five hundred twenty-eight million, five hundred thirty thousand, eight hundred ninety-one".