280553 has 8 divisors (see below), whose sum is σ = 345408. Its totient is φ = 221904.

The previous prime is 280549. The next prime is 280561. The reversal of 280553 is 355082.

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 280553 - 2² = 280549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 1632.

It is an arithmetic number, because the mean of its divisors is an integer number (43176).

2²⁸⁰⁵⁵³ is an apocalyptic number.

It is an amenable number.

280553 is a deficient number, since it is larger than the sum of its proper divisors (64855).

280553 is a wasteful number, since it uses less digits than its factorization.

280553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 280553 is about 529.6725403492. The cubic root of 280553 is about 65.4643669208.

Subtracting 280553 from its reverse (355082), we obtain a square (74529 = 273²).

The spelling of 280553 in words is "two hundred eighty thousand, five hundred fifty-three".