2528161525 has 6 divisors (see below), whose sum is σ = 3134920322. Its totient is φ = 2022529200.

The previous prime is 2528161513. The next prime is 2528161529. The reversal of 2528161525 is 5251618252.

It can be written as a sum of positive squares in 3 ways, for example, as 238826116 + 2289335409 = 15454^2 + 47847^2 .

It is not a de Polignac number, because 2528161525 - 2¹⁹ = 2527637237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528161529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50563206 + ... + 50563255.

Almost surely, 2^2528161525 is an apocalyptic number.

2528161525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2528161525 is a deficient number, since it is larger than the sum of its proper divisors (606758797).

2528161525 is a wasteful number, since it uses less digits than its factorization.

2528161525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101126471 (or 101126466 counting only the distinct ones).

The product of its digits is 48000, while the sum is 37.

The square root of 2528161525 is about 50280.8266141280. The cubic root of 2528161525 is about 1362.2859344417.

Adding to 2528161525 its reverse (5251618252), we get a palindrome (7779779777).

The spelling of 2528161525 in words is "two billion, five hundred twenty-eight million, one hundred sixty-one thousand, five hundred twenty-five".