280207255 has 4 divisors (see below), whose sum is σ = 336248712. Its totient is φ = 224165800.

The previous prime is 280207247. The next prime is 280207259. The reversal of 280207255 is 552702082.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 280207255 - 2³ = 280207247 is a prime.

It is a super-2 number, since 2×280207255² = 157032211509270050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280207259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28020721 + ... + 28020730.

It is an arithmetic number, because the mean of its divisors is an integer number (84062178).

Almost surely, 2^280207255 is an apocalyptic number.

280207255 is a deficient number, since it is larger than the sum of its proper divisors (56041457).

280207255 is an equidigital number, since it uses as much as digits as its factorization.

280207255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56041456.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 280207255 is about 16739.3923127454. The cubic root of 280207255 is about 654.3746376677.

The spelling of 280207255 in words is "two hundred eighty million, two hundred seven thousand, two hundred fifty-five".