280585225 has 6 divisors (see below), whose sum is σ = 347925710. Its totient is φ = 224468160.

The previous prime is 280585223. The next prime is 280585229. The reversal of 280585225 is 522585082.

It can be written as a sum of positive squares in 3 ways, for example, as 58813561 + 221771664 = 7669^2 + 14892^2 .

It is not a de Polignac number, because 280585225 - 2¹ = 280585223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280585223) 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 5 ways as a sum of consecutive naturals, for example, 5611680 + ... + 5611729.

Almost surely, 2^280585225 is an apocalyptic number.

280585225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280585225 is a deficient number, since it is larger than the sum of its proper divisors (67340485).

280585225 is a wasteful number, since it uses less digits than its factorization.

280585225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11223419 (or 11223414 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 280585225 is about 16750.6783444731. The cubic root of 280585225 is about 654.6687329032.

The spelling of 280585225 in words is "two hundred eighty million, five hundred eighty-five thousand, two hundred twenty-five".