243146215 has 12 divisors (see below), whose sum is σ = 315947304. Its totient is φ = 179553504.

The previous prime is 243146213. The next prime is 243146221. The reversal of 243146215 is 512641342.

It is not a de Polignac number, because 243146215 - 2¹ = 243146213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243146213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143029 + ... + 144718.

It is an arithmetic number, because the mean of its divisors is an integer number (26328942).

Almost surely, 2^243146215 is an apocalyptic number.

243146215 is a deficient number, since it is larger than the sum of its proper divisors (72801089).

243146215 is a wasteful number, since it uses less digits than its factorization.

243146215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287778 (or 287765 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 243146215 is about 15593.1464111641. The cubic root of 243146215 is about 624.1502820907.

Adding to 243146215 its reverse (512641342), we get a palindrome (755787557).

The spelling of 243146215 in words is "two hundred forty-three million, one hundred forty-six thousand, two hundred fifteen".