249856225 has 12 divisors (see below), whose sum is σ = 328047084. Its totient is φ = 188126720.

The previous prime is 249856219. The next prime is 249856247. The reversal of 249856225 is 522658942.

It can be written as a sum of positive squares in 6 ways, for example, as 8271376 + 241584849 = 2876^2 + 15543^2 .

It is not a de Polignac number, because 249856225 - 2¹¹ = 249854177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293524 + ... + 294373.

It is an arithmetic number, because the mean of its divisors is an integer number (27337257).

Almost surely, 2^249856225 is an apocalyptic number.

249856225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249856225 is a deficient number, since it is larger than the sum of its proper divisors (78190859).

249856225 is a wasteful number, since it uses less digits than its factorization.

249856225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587924 (or 587919 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 249856225 is about 15806.8410822656. The cubic root of 249856225 is about 629.8397383571.

The spelling of 249856225 in words is "two hundred forty-nine million, eight hundred fifty-six thousand, two hundred twenty-five".