243755245 has 4 divisors (see below), whose sum is σ = 292506300. Its totient is φ = 195004192.

The previous prime is 243755243. The next prime is 243755257. The reversal of 243755245 is 542557342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542557342 = 2 ⋅271278671.

It can be written as a sum of positive squares in 2 ways, for example, as 182007081 + 61748164 = 13491^2 + 7858^2 .

It is a cyclic number.

It is not a de Polignac number, because 243755245 - 2¹ = 243755243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243755243) 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, 24375520 + ... + 24375529.

It is an arithmetic number, because the mean of its divisors is an integer number (73126575).

Almost surely, 2^243755245 is an apocalyptic number.

It is an amenable number.

243755245 is a deficient number, since it is larger than the sum of its proper divisors (48751055).

243755245 is an equidigital number, since it uses as much as digits as its factorization.

243755245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48751054.

The product of its digits is 168000, while the sum is 37.

The square root of 243755245 is about 15612.6629695257. The cubic root of 243755245 is about 624.6709692124.

The spelling of 243755245 in words is "two hundred forty-three million, seven hundred fifty-five thousand, two hundred forty-five".