280248478225 has 27 divisors (see below), whose sum is σ = 349757722363. Its totient is φ = 222756737840.

The previous prime is 280248478151. The next prime is 280248478243. The reversal of 280248478225 is 522874842082.

The square root of 280248478225 is 529385.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 100889452161 + 179359026064 = 317631^2 + 423508^2 .

It is a de Polignac number, because none of the positive numbers 2^k-280248478225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 632614854 + ... + 632615296.

Almost surely, 2^280248478225 is an apocalyptic number.

280248478225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280248478225 is the 529385-th square number.

280248478225 is the 264693-rd centered octagonal number.

It is an amenable number.

280248478225 is a deficient number, since it is larger than the sum of its proper divisors (69509244138).

280248478225 is an frugal number, since it uses more digits than its factorization.

280248478225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374 (or 687 counting only the distinct ones).

The product of its (nonzero) digits is 4587520, while the sum is 52.

The spelling of 280248478225 in words is "two hundred eighty billion, two hundred forty-eight million, four hundred seventy-eight thousand, two hundred twenty-five".