243042303 has 24 divisors (see below), whose sum is σ = 377713920. Its totient is φ = 138605040.

The previous prime is 243042277. The next prime is 243042329. The reversal of 243042303 is 303240342.

It is an interprime number because it is at equal distance from previous prime (243042277) and next prime (243042329).

It is not a de Polignac number, because 243042303 - 2¹⁸ = 242780159 is a prime.

It is a super-2 number, since 2×243042303² = 118139122095087618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 243042303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243042103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89658 + ... + 92328.

It is an arithmetic number, because the mean of its divisors is an integer number (15738080).

Almost surely, 2^243042303 is an apocalyptic number.

243042303 is a deficient number, since it is larger than the sum of its proper divisors (134671617).

243042303 is a wasteful number, since it uses less digits than its factorization.

243042303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307 (or 3300 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 243042303 is about 15589.8140784295. The cubic root of 243042303 is about 624.0613562490.

Adding to 243042303 its reverse (303240342), we get a palindrome (546282645).

The spelling of 243042303 in words is "two hundred forty-three million, forty-two thousand, three hundred three".