280551 has 8 divisors (see below), whose sum is σ = 396144. Its totient is φ = 176000.

The previous prime is 280549. The next prime is 280561. The reversal of 280551 is 155082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280551 - 2¹ = 280549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2700 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (49518).

2²⁸⁰⁵⁵¹ is an apocalyptic number.

280551 is a deficient number, since it is larger than the sum of its proper divisors (115593).

280551 is a wasteful number, since it uses less digits than its factorization.

280551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5521.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 280551 is about 529.6706523869. The cubic root of 280551 is about 65.4642113601.

The spelling of 280551 in words is "two hundred eighty thousand, five hundred fifty-one".