280255505 has 16 divisors (see below), whose sum is σ = 340205184. Its totient is φ = 221619840.

The previous prime is 280255499. The next prime is 280255511. The reversal of 280255505 is 505552082.

It is an interprime number because it is at equal distance from previous prime (280255499) and next prime (280255511).

It is not a de Polignac number, because 280255505 - 2¹⁴ = 280239121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204332 + ... + 205698.

It is an arithmetic number, because the mean of its divisors is an integer number (21262824).

Almost surely, 2^280255505 is an apocalyptic number.

It is an amenable number.

280255505 is a deficient number, since it is larger than the sum of its proper divisors (59949679).

280255505 is a wasteful number, since it uses less digits than its factorization.

280255505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 280255505 is about 16740.8334619278. The cubic root of 280255505 is about 654.4121953013.

The spelling of 280255505 in words is "two hundred eighty million, two hundred fifty-five thousand, five hundred five".