243250313 has 4 divisors (see below), whose sum is σ = 243408900. Its totient is φ = 243091728.

The previous prime is 243250303. The next prime is 243250327. The reversal of 243250313 is 313052342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115175824 + 128074489 = 10732^2 + 11317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243250313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243250303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76970 + ... + 80067.

It is an arithmetic number, because the mean of its divisors is an integer number (60852225).

Almost surely, 2^243250313 is an apocalyptic number.

It is an amenable number.

243250313 is a deficient number, since it is larger than the sum of its proper divisors (158587).

243250313 is a wasteful number, since it uses less digits than its factorization.

243250313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158586.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 243250313 is about 15596.4839947983. The cubic root of 243250313 is about 624.2393417072.

The spelling of 243250313 in words is "two hundred forty-three million, two hundred fifty thousand, three hundred thirteen".