280247225 has 12 divisors (see below), whose sum is σ = 350950380. Its totient is φ = 221976000.

The previous prime is 280247221. The next prime is 280247239. The reversal of 280247225 is 522742082.

It can be written as a sum of positive squares in 6 ways, for example, as 67699984 + 212547241 = 8228^2 + 14579^2 .

It is not a de Polignac number, because 280247225 - 2² = 280247221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 280247191 and 280247200.

It is not an unprimeable number, because it can be changed into a prime (280247221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52970 + ... + 58019.

It is an arithmetic number, because the mean of its divisors is an integer number (29245865).

Almost surely, 2^280247225 is an apocalyptic number.

280247225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280247225 is a deficient number, since it is larger than the sum of its proper divisors (70703155).

280247225 is a wasteful number, since it uses less digits than its factorization.

280247225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111100 (or 111095 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 280247225 is about 16740.5861605859. The cubic root of 280247225 is about 654.4057504842.

The spelling of 280247225 in words is "two hundred eighty million, two hundred forty-seven thousand, two hundred twenty-five".