8151881 has 2 divisors, whose sum is σ = 8151882. Its totient is φ = 8151880.

The previous prime is 8151859. The next prime is 8151887. The reversal of 8151881 is 1881518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7070281 + 1081600 = 2659^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 8151881 - 2¹⁴ = 8135497 is a prime.

It is a super-2 number, since 2×8151881² = 132906327676322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8151887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4075940 + 4075941.

It is an arithmetic number, because the mean of its divisors is an integer number (4075941).

Almost surely, 2^8151881 is an apocalyptic number.

It is an amenable number.

8151881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151881 is an equidigital number, since it uses as much as digits as its factorization.

8151881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 32.

The square root of 8151881 is about 2855.1499084987. The cubic root of 8151881 is about 201.2577487597.

The spelling of 8151881 in words is "eight million, one hundred fifty-one thousand, eight hundred eighty-one".