280080553 has 4 divisors (see below), whose sum is σ = 286911828. Its totient is φ = 273249280.

The previous prime is 280080551. The next prime is 280080583. The reversal of 280080553 is 355080082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 135792409 + 144288144 = 11653^2 + 12012^2 .

It is a cyclic number.

It is not a de Polignac number, because 280080553 - 2¹ = 280080551 is a prime.

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 not an unprimeable number, because it can be changed into a prime (280080551) 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, 3415576 + ... + 3415657.

It is an arithmetic number, because the mean of its divisors is an integer number (71727957).

Almost surely, 2^280080553 is an apocalyptic number.

It is an amenable number.

280080553 is a deficient number, since it is larger than the sum of its proper divisors (6831275).

280080553 is an equidigital number, since it uses as much as digits as its factorization.

280080553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831274.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 280080553 is about 16735.6073388449. The cubic root of 280080553 is about 654.2759927378.

The spelling of 280080553 in words is "two hundred eighty million, eighty thousand, five hundred fifty-three".