2528407081 has 4 divisors (see below), whose sum is σ = 2546597200. Its totient is φ = 2510216964.

The previous prime is 2528407061. The next prime is 2528407097. The reversal of 2528407081 is 1807048252.

2528407081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2528407081 - 2⁷ = 2528406953 is a prime.

It is a super-2 number, since 2×2528407081² = 12785684734501881122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2528407081.

It is not an unprimeable number, because it can be changed into a prime (2528407001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9094851 + ... + 9095128.

It is an arithmetic number, because the mean of its divisors is an integer number (636649300).

Almost surely, 2^2528407081 is an apocalyptic number.

It is an amenable number.

2528407081 is a deficient number, since it is larger than the sum of its proper divisors (18190119).

2528407081 is a wasteful number, since it uses less digits than its factorization.

2528407081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18190118.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 2528407081 is about 50283.2684001349. The cubic root of 2528407081 is about 1362.3300385139.

The spelling of 2528407081 in words is "two billion, five hundred twenty-eight million, four hundred seven thousand, eighty-one".