243402303 has 4 divisors (see below), whose sum is σ = 324536408. Its totient is φ = 162268200.

The previous prime is 243402301. The next prime is 243402347. The reversal of 243402303 is 303204342.

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

It is not a de Polignac number, because 243402303 - 2¹ = 243402301 is a prime.

It is a super-2 number, since 2×243402303² = 118489362211407618, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243402303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243402301) 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 in 3 ways as a sum of consecutive naturals, for example, 40567048 + ... + 40567053.

It is an arithmetic number, because the mean of its divisors is an integer number (81134102).

Almost surely, 2^243402303 is an apocalyptic number.

243402303 is a deficient number, since it is larger than the sum of its proper divisors (81134105).

243402303 is an equidigital number, since it uses as much as digits as its factorization.

243402303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81134104.

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

The square root of 243402303 is about 15601.3558064676. The cubic root of 243402303 is about 624.3693290474.

Adding to 243402303 its reverse (303204342), we get a palindrome (546606645).

The spelling of 243402303 in words is "two hundred forty-three million, four hundred two thousand, three hundred three".