249502217 has 8 divisors (see below), whose sum is σ = 269164296. Its totient is φ = 230394112.

The previous prime is 249502213. The next prime is 249502223. The reversal of 249502217 is 712205942.

It can be written as a sum of positive squares in 4 ways, for example, as 154654096 + 94848121 = 12436^2 + 9739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 249502217 - 2² = 249502213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249502213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137558 + ... + 139359.

It is an arithmetic number, because the mean of its divisors is an integer number (33645537).

Almost surely, 2^249502217 is an apocalyptic number.

It is an amenable number.

249502217 is a deficient number, since it is larger than the sum of its proper divisors (19662079).

249502217 is a wasteful number, since it uses less digits than its factorization.

249502217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276987.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 249502217 is about 15795.6391766842. The cubic root of 249502217 is about 629.5421356150.

The spelling of 249502217 in words is "two hundred forty-nine million, five hundred two thousand, two hundred seventeen".