243020351 has 12 divisors (see below), whose sum is σ = 287492040. Its totient is φ = 204770160.

The previous prime is 243020339. The next prime is 243020357. The reversal of 243020351 is 153020342.

It is a happy number.

It is not a de Polignac number, because 243020351 - 2¹⁰ = 243019327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243020357) 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 11 ways as a sum of consecutive naturals, for example, 39140 + ... + 44921.

It is an arithmetic number, because the mean of its divisors is an integer number (23957670).

Almost surely, 2^243020351 is an apocalyptic number.

243020351 is a deficient number, since it is larger than the sum of its proper divisors (44471689).

243020351 is an equidigital number, since it uses as much as digits as its factorization.

243020351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84134 (or 84127 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 243020351 is about 15589.1100130829. The cubic root of 243020351 is about 624.0425669173.

Adding to 243020351 its reverse (153020342), we get a palindrome (396040693).

Subtracting from 243020351 its reverse (153020342), we obtain a palindrome (90000009).

The spelling of 243020351 in words is "two hundred forty-three million, twenty thousand, three hundred fifty-one".