80831281 has 2 divisors, whose sum is σ = 80831282. Its totient is φ = 80831280.

The previous prime is 80831251. The next prime is 80831297. The reversal of 80831281 is 18213808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 119025 = 8984^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 80831281 - 2⁵ = 80831249 is a prime.

It is a super-2 number, since 2×80831281² = 13067391976201922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (80831251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40415640 + 40415641.

It is an arithmetic number, because the mean of its divisors is an integer number (40415641).

Almost surely, 2^80831281 is an apocalyptic number.

It is an amenable number.

80831281 is a deficient number, since it is larger than the sum of its proper divisors (1).

80831281 is an equidigital number, since it uses as much as digits as its factorization.

80831281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 80831281 is about 8990.6218361135. The cubic root of 80831281 is about 432.3742488051.

The spelling of 80831281 in words is "eighty million, eight hundred thirty-one thousand, two hundred eighty-one".