2528206109 has 32 divisors (see below), whose sum is σ = 3125001600. Its totient is φ = 2013500160.

The previous prime is 2528206099. The next prime is 2528206117. The reversal of 2528206109 is 9016028252.

It is a happy number.

It is not a de Polignac number, because 2528206109 - 2⁸ = 2528205853 is a prime.

It is a super-2 number, since 2×2528206109² = 12783652259169839762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2528206129) 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 31 ways as a sum of consecutive naturals, for example, 239507 + ... + 249839.

It is an arithmetic number, because the mean of its divisors is an integer number (97656300).

Almost surely, 2^2528206109 is an apocalyptic number.

2528206109 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2528206109 is a deficient number, since it is larger than the sum of its proper divisors (596795491).

2528206109 is a wasteful number, since it uses less digits than its factorization.

2528206109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10445.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2528206109 is about 50281.2699620843. The cubic root of 2528206109 is about 1362.2939423424.

The spelling of 2528206109 in words is "two billion, five hundred twenty-eight million, two hundred six thousand, one hundred nine".