243013303 has 4 divisors (see below), whose sum is σ = 261706648. Its totient is φ = 224319960.

The previous prime is 243013259. The next prime is 243013307. The reversal of 243013303 is 303310342.

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

It is a cyclic number.

It is not a de Polignac number, because 243013303 - 2¹³ = 243005111 is a prime.

It is a super-4 number, since 4×243013303⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243013307) 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, 9346653 + ... + 9346678.

It is an arithmetic number, because the mean of its divisors is an integer number (65426662).

Almost surely, 2^243013303 is an apocalyptic number.

243013303 is a deficient number, since it is larger than the sum of its proper divisors (18693345).

243013303 is a wasteful number, since it uses less digits than its factorization.

243013303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18693344.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 243013303 is about 15588.8839562042. The cubic root of 243013303 is about 624.0365340967.

Adding to 243013303 its reverse (303310342), we get a palindrome (546323645).

The spelling of 243013303 in words is "two hundred forty-three million, thirteen thousand, three hundred three".