243943351 has 4 divisors (see below), whose sum is σ = 243975600. Its totient is φ = 243911104.

The previous prime is 243943339. The next prime is 243943361. The reversal of 243943351 is 153349342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243943351 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 (243943361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2055 + ... + 22183.

It is an arithmetic number, because the mean of its divisors is an integer number (60993900).

Almost surely, 2^243943351 is an apocalyptic number.

243943351 is a deficient number, since it is larger than the sum of its proper divisors (32249).

243943351 is a wasteful number, since it uses less digits than its factorization.

243943351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32248.

The product of its digits is 38880, while the sum is 34.

The square root of 243943351 is about 15618.6859562512. The cubic root of 243943351 is about 624.8316141580.

The spelling of 243943351 in words is "two hundred forty-three million, nine hundred forty-three thousand, three hundred fifty-one".