249775225 has 24 divisors (see below), whose sum is σ = 356260928. Its totient is φ = 170164800.

The previous prime is 249775217. The next prime is 249775241. The reversal of 249775225 is 522577942.

It is not a de Polignac number, because 249775225 - 2³ = 249775217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22930 + ... + 32020.

Almost surely, 2^249775225 is an apocalyptic number.

249775225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249775225 is a deficient number, since it is larger than the sum of its proper divisors (106485703).

249775225 is a wasteful number, since it uses less digits than its factorization.

249775225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9265 (or 9260 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 249775225 is about 15804.2786928097. The cubic root of 249775225 is about 629.7716691667.

It can be divided in two parts, 249775 and 225, that added together give a square (250000 = 500²).

The spelling of 249775225 in words is "two hundred forty-nine million, seven hundred seventy-five thousand, two hundred twenty-five".