2800010081 has 4 divisors (see below), whose sum is σ = 3054556464. Its totient is φ = 2545463700.

The previous prime is 2800010029. The next prime is 2800010093. The reversal of 2800010081 is 1800100082.

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 2800010081 - 2¹⁰ = 2800009057 is a prime.

It is a super-2 number, since 2×2800010081² = 15680112907403253122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2800010011) 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, 127273175 + ... + 127273196.

It is an arithmetic number, because the mean of its divisors is an integer number (763639116).

Almost surely, 2^2800010081 is an apocalyptic number.

It is an amenable number.

2800010081 is a deficient number, since it is larger than the sum of its proper divisors (254546383).

2800010081 is a wasteful number, since it uses less digits than its factorization.

2800010081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254546382.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 2800010081 is about 52915.1214777024. The cubic root of 2800010081 is about 1409.4614379304.

Subtracting from 2800010081 its reverse (1800100082), we obtain a palindrome (999909999).

The spelling of 2800010081 in words is "two billion, eight hundred million, ten thousand, eighty-one".