80733281 has 2 divisors, whose sum is σ = 80733282. Its totient is φ = 80733280.

The previous prime is 80733277. The next prime is 80733329. The reversal of 80733281 is 18233708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 21025 = 8984^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 80733281 - 2² = 80733277 is a prime.

It is a super-2 number, since 2×80733281² = 13035725322049922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80733241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40366640 + 40366641.

It is an arithmetic number, because the mean of its divisors is an integer number (40366641).

Almost surely, 2^80733281 is an apocalyptic number.

It is an amenable number.

80733281 is a deficient number, since it is larger than the sum of its proper divisors (1).

80733281 is an equidigital number, since it uses as much as digits as its factorization.

80733281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 80733281 is about 8985.1700596038. The cubic root of 80733281 is about 432.1994410177.

Adding to 80733281 its reverse (18233708), we get a palindrome (98966989).

The spelling of 80733281 in words is "eighty million, seven hundred thirty-three thousand, two hundred eighty-one".