243616545 has 64 divisors (see below), whose sum is σ = 463553280. Its totient is φ = 120960000.

The previous prime is 243616517. The next prime is 243616561. The reversal of 243616545 is 545616342.

It is not a de Polignac number, because 243616545 - 2¹³ = 243608353 is a prime.

It is a super-3 number, since 3×243616545³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 231270 + ... + 232320.

It is an arithmetic number, because the mean of its divisors is an integer number (7243020).

Almost surely, 2^243616545 is an apocalyptic number.

It is an amenable number.

243616545 is a deficient number, since it is larger than the sum of its proper divisors (219936735).

243616545 is a wasteful number, since it uses less digits than its factorization.

243616545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1177 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 243616545 is about 15608.2204302733. The cubic root of 243616545 is about 624.5524646826.

It can be divided in two parts, 2436 and 16545, that added together give a palindrome (18981).

The spelling of 243616545 in words is "two hundred forty-three million, six hundred sixteen thousand, five hundred forty-five".