2528721285 has 32 divisors (see below), whose sum is σ = 4080040320. Its totient is φ = 1337326848.

The previous prime is 2528721281. The next prime is 2528721301. The reversal of 2528721285 is 5821278252.

2528721285 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 2528721285 - 2² = 2528721281 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528721281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1739619 + ... + 1741071.

It is an arithmetic number, because the mean of its divisors is an integer number (127501260).

Almost surely, 2^2528721285 is an apocalyptic number.

It is an amenable number.

2528721285 is a deficient number, since it is larger than the sum of its proper divisors (1551319035).

2528721285 is a wasteful number, since it uses less digits than its factorization.

2528721285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357.

The product of its digits is 179200, while the sum is 42.

The square root of 2528721285 is about 50286.3926425430. The cubic root of 2528721285 is about 1362.3864682216.

The spelling of 2528721285 in words is "two billion, five hundred twenty-eight million, seven hundred twenty-one thousand, two hundred eighty-five".