280822081 has 4 divisors (see below), whose sum is σ = 283717252. Its totient is φ = 277926912.

The previous prime is 280822067. The next prime is 280822103. The reversal of 280822081 is 180228082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180228082 = 2 ⋅90114041.

It can be written as a sum of positive squares in 2 ways, for example, as 90630400 + 190191681 = 9520^2 + 13791^2 .

It is a cyclic number.

It is not a de Polignac number, because 280822081 - 2⁷ = 280821953 is a prime.

It is a super-2 number, since 2×280822081² = 157722082354341122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280820081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1447440 + ... + 1447633.

It is an arithmetic number, because the mean of its divisors is an integer number (70929313).

Almost surely, 2^280822081 is an apocalyptic number.

It is an amenable number.

280822081 is a deficient number, since it is larger than the sum of its proper divisors (2895171).

280822081 is an equidigital number, since it uses as much as digits as its factorization.

280822081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895170.

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 280822081 is about 16757.7468950930. The cubic root of 280822081 is about 654.8528939496.

The spelling of 280822081 in words is "two hundred eighty million, eight hundred twenty-two thousand, eighty-one".