243442145 has 8 divisors (see below), whose sum is σ = 295413480. Its totient is φ = 192565120.

The previous prime is 243442141. The next prime is 243442151. The reversal of 243442145 is 541244342.

It can be written as a sum of positive squares in 4 ways, for example, as 34668544 + 208773601 = 5888^2 + 14449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243442145 - 2² = 243442141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243442141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273086 + ... + 273975.

It is an arithmetic number, because the mean of its divisors is an integer number (36926685).

Almost surely, 2^243442145 is an apocalyptic number.

It is an amenable number.

243442145 is a deficient number, since it is larger than the sum of its proper divisors (51971335).

243442145 is an equidigital number, since it uses as much as digits as its factorization.

243442145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547155.

The product of its digits is 15360, while the sum is 29.

The square root of 243442145 is about 15602.6326304249. The cubic root of 243442145 is about 624.4033944134.

Adding to 243442145 its reverse (541244342), we get a palindrome (784686487).

The spelling of 243442145 in words is "two hundred forty-three million, four hundred forty-two thousand, one hundred forty-five".