249213568 has 16 divisors (see below), whose sum is σ = 496480410. Its totient is φ = 124606720.

The previous prime is 249213563. The next prime is 249213589. The reversal of 249213568 is 865312942.

249213568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 144192064 + 105021504 = 12008^2 + 10248^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 249213568.

It is not an unprimeable number, because it can be changed into a prime (249213563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973363 + ... + 973618.

Almost surely, 2^249213568 is an apocalyptic number.

It is an amenable number.

249213568 is a deficient number, since it is larger than the sum of its proper divisors (247266842).

249213568 is an equidigital number, since it uses as much as digits as its factorization.

249213568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946995 (or 1946983 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 249213568 is about 15786.4995486650. The cubic root of 249213568 is about 629.2992695981.

The spelling of 249213568 in words is "two hundred forty-nine million, two hundred thirteen thousand, five hundred sixty-eight".