8201881 has 2 divisors, whose sum is σ = 8201882. Its totient is φ = 8201880.

The previous prime is 8201873. The next prime is 8201891. The reversal of 8201881 is 1881028.

8201881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7241481 + 960400 = 2691^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 8201881 - 2³ = 8201873 is a prime.

It is a super-2 number, since 2×8201881² = 134541703876322, which contains 22 as substring.

8201881 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8201801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4100940 + 4100941.

It is an arithmetic number, because the mean of its divisors is an integer number (4100941).

Almost surely, 2^8201881 is an apocalyptic number.

It is an amenable number.

8201881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8201881 is an equidigital number, since it uses as much as digits as its factorization.

8201881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 8201881 is about 2863.8926306690. The cubic root of 8201881 is about 201.6683854174.

It can be divided in two parts, 820 and 1881, that added together give a triangular number (2701 = T₇₃).

The spelling of 8201881 in words is "eight million, two hundred one thousand, eight hundred eighty-one".