8181801 has 6 divisors (see below), whose sum is σ = 11818170. Its totient is φ = 5454528.

The previous prime is 8181791. The next prime is 8181809. The reversal of 8181801 is 1081818.

8181801 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6969600 + 1212201 = 2640^2 + 1101^2 .

It is not a de Polignac number, because 8181801 - 2¹⁷ = 8050729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8181809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454536 + ... + 454553.

It is an arithmetic number, because the mean of its divisors is an integer number (1969695).

Almost surely, 2^8181801 is an apocalyptic number.

It is an amenable number.

8181801 is a deficient number, since it is larger than the sum of its proper divisors (3636369).

8181801 is a wasteful number, since it uses less digits than its factorization.

8181801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909095 (or 909092 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 27.

The square root of 8181801 is about 2860.3847643280. The cubic root of 8181801 is about 201.5036748114.

The spelling of 8181801 in words is "eight million, one hundred eighty-one thousand, eight hundred one".