249945218 has 8 divisors (see below), whose sum is σ = 377012880. Its totient is φ = 124274260.

The previous prime is 249945193. The next prime is 249945221. The reversal of 249945218 is 812549942.

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

It is a super-2 number, since 2×249945218² = 124945224002135048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348728 + ... + 349443.

It is an arithmetic number, because the mean of its divisors is an integer number (47126610).

Almost surely, 2^249945218 is an apocalyptic number.

249945218 is a deficient number, since it is larger than the sum of its proper divisors (127067662).

249945218 is a wasteful number, since it uses less digits than its factorization.

249945218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698352.

The product of its digits is 207360, while the sum is 44.

The square root of 249945218 is about 15809.6558469816. The cubic root of 249945218 is about 629.9145075894.

The spelling of 249945218 in words is "two hundred forty-nine million, nine hundred forty-five thousand, two hundred eighteen".