2528115261 has 24 divisors (see below), whose sum is σ = 3970811520. Its totient is φ = 1426344192.

The previous prime is 2528115257. The next prime is 2528115287. The reversal of 2528115261 is 1625118252.

It is not a de Polignac number, because 2528115261 - 2² = 2528115257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528115061) 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, 97236 + ... + 120461.

It is an arithmetic number, because the mean of its divisors is an integer number (165450480).

Almost surely, 2^2528115261 is an apocalyptic number.

2528115261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2528115261 is a deficient number, since it is larger than the sum of its proper divisors (1442696259).

2528115261 is a wasteful number, since it uses less digits than its factorization.

2528115261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217793 (or 217786 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 2528115261 is about 50280.3665559431. The cubic root of 2528115261 is about 1362.2776246903.

The spelling of 2528115261 in words is "two billion, five hundred twenty-eight million, one hundred fifteen thousand, two hundred sixty-one".