243115331013 has 8 divisors (see below), whose sum is σ = 360170860800. Its totient is φ = 162076887324.

The previous prime is 243115330967. The next prime is 243115331027. The reversal of 243115331013 is 310133511342.

243115331013 is a `hidden beast` number, since 2 + 4 + 311 + 5 + 331 + 0 + 13 = 666.

It is not a de Polignac number, because 243115331013 - 2⁶ = 243115330949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9004271519 = 243115331013 / (2 + 4 + 3 + 1 + 1 + 5 + 3 + 3 + 1 + 0 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115331113) 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, 4502135733 + ... + 4502135786.

It is an arithmetic number, because the mean of its divisors is an integer number (45021357600).

Almost surely, 2^243115331013 is an apocalyptic number.

It is an amenable number.

243115331013 is a deficient number, since it is larger than the sum of its proper divisors (117055529787).

243115331013 is an equidigital number, since it uses as much as digits as its factorization.

243115331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9004271528 (or 9004271522 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 243115331013 its reverse (310133511342), we get a palindrome (553248842355).

The spelling of 243115331013 in words is "two hundred forty-three billion, one hundred fifteen million, three hundred thirty-one thousand, thirteen".