243032013 has 18 divisors (see below), whose sum is σ = 408360654. Its totient is φ = 138875184.

The previous prime is 243031979. The next prime is 243032047. The reversal of 243032013 is 310230342.

It is an interprime number because it is at equal distance from previous prime (243031979) and next prime (243032047).

It can be written as a sum of positive squares in only one way, i.e., 242798724 + 233289 = 15582^2 + 483^2 .

It is not a de Polignac number, because 243032013 - 2¹³ = 243023821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243032063) 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 17 ways as a sum of consecutive naturals, for example, 275106 + ... + 275987.

It is an arithmetic number, because the mean of its divisors is an integer number (22686703).

Almost surely, 2^243032013 is an apocalyptic number.

It is an amenable number.

243032013 is a deficient number, since it is larger than the sum of its proper divisors (165328641).

243032013 is a wasteful number, since it uses less digits than its factorization.

243032013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551113 (or 551103 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 243032013 is about 15589.4840517575. The cubic root of 243032013 is about 624.0525488907.

Adding to 243032013 its reverse (310230342), we get a palindrome (553262355).

It can be divided in two parts, 2430 and 32013, that added together give a palindrome (34443).

The spelling of 243032013 in words is "two hundred forty-three million, thirty-two thousand, thirteen".