810201081 has 8 divisors (see below), whose sum is σ = 1080405760. Its totient is φ = 540065232.

The previous prime is 810201061. The next prime is 810201103. The reversal of 810201081 is 180102018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 810201081 - 2⁷ = 810200953 is a prime.

It is a super-2 number, since 2×810201081² = 1312851583307137122, 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 (810201061) 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 7 ways as a sum of consecutive naturals, for example, 25176 + ... + 47478.

It is an arithmetic number, because the mean of its divisors is an integer number (135050720).

Almost surely, 2^810201081 is an apocalyptic number.

It is an amenable number.

810201081 is a deficient number, since it is larger than the sum of its proper divisors (270204679).

810201081 is a wasteful number, since it uses less digits than its factorization.

810201081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34415.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 810201081 is about 28464.0313553790. The cubic root of 810201081 is about 932.2468818756.

Adding to 810201081 its reverse (180102018), we get a palindrome (990303099).

The spelling of 810201081 in words is "eight hundred ten million, two hundred one thousand, eighty-one".