243140013 has 6 divisors (see below), whose sum is σ = 351202254. Its totient is φ = 162093336.

The previous prime is 243140011. The next prime is 243140041. The reversal of 243140013 is 310041342.

It can be written as a sum of positive squares in only one way, i.e., 166874724 + 76265289 = 12918^2 + 8733^2 .

It is not a de Polignac number, because 243140013 - 2¹ = 243140011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243140011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13507770 + ... + 13507787.

It is an arithmetic number, because the mean of its divisors is an integer number (58533709).

Almost surely, 2^243140013 is an apocalyptic number.

It is an amenable number.

243140013 is a deficient number, since it is larger than the sum of its proper divisors (108062241).

243140013 is a wasteful number, since it uses less digits than its factorization.

243140013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27015563 (or 27015560 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 243140013 is about 15592.9475404748. The cubic root of 243140013 is about 624.1449752524.

Adding to 243140013 its reverse (310041342), we get a palindrome (553181355).

The spelling of 243140013 in words is "two hundred forty-three million, one hundred forty thousand, thirteen".