243273345 has 32 divisors (see below), whose sum is σ = 445713408. Its totient is φ = 110993088.

The previous prime is 243273319. The next prime is 243273361. The reversal of 243273345 is 543372342.

It is not a de Polignac number, because 243273345 - 2⁵ = 243273313 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59662 + ... + 63608.

It is an arithmetic number, because the mean of its divisors is an integer number (13928544).

Almost surely, 2^243273345 is an apocalyptic number.

It is an amenable number.

243273345 is a deficient number, since it is larger than the sum of its proper divisors (202440063).

243273345 is a wasteful number, since it uses less digits than its factorization.

243273345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4549.

The product of its digits is 60480, while the sum is 33.

The square root of 243273345 is about 15597.2223488671. Note that the first 3 decimals coincide. The cubic root of 243273345 is about 624.2590429861.

It can be divided in two parts, 24327 and 3345, that added together give a palindrome (27672).

The spelling of 243273345 in words is "two hundred forty-three million, two hundred seventy-three thousand, three hundred forty-five".