243854245 has 4 divisors (see below), whose sum is σ = 292625100. Its totient is φ = 195083392.

The previous prime is 243854207. The next prime is 243854263. The reversal of 243854245 is 542458342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69772609 + 174081636 = 8353^2 + 13194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243854245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24385420 + ... + 24385429.

It is an arithmetic number, because the mean of its divisors is an integer number (73156275).

Almost surely, 2^243854245 is an apocalyptic number.

It is an amenable number.

243854245 is a deficient number, since it is larger than the sum of its proper divisors (48770855).

243854245 is an equidigital number, since it uses as much as digits as its factorization.

243854245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48770854.

The product of its digits is 153600, while the sum is 37.

The square root of 243854245 is about 15615.8331510041. The cubic root of 243854245 is about 624.7555267850.

The spelling of 243854245 in words is "two hundred forty-three million, eight hundred fifty-four thousand, two hundred forty-five".