243112312513 has 16 divisors (see below), whose sum is σ = 281312352000. Its totient is φ = 205785499392.

The previous prime is 243112312493. The next prime is 243112312537. The reversal of 243112312513 is 315213211342.

It is a cyclic number.

It is not a de Polignac number, because 243112312513 - 2¹³ = 243112304321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243112312543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262828 + ... + 745186.

It is an arithmetic number, because the mean of its divisors is an integer number (17582022000).

Almost surely, 2^243112312513 is an apocalyptic number.

It is an amenable number.

243112312513 is a deficient number, since it is larger than the sum of its proper divisors (38200039487).

243112312513 is an equidigital number, since it uses as much as digits as its factorization.

243112312513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483264.

The product of its digits is 4320, while the sum is 28.

Adding to 243112312513 its reverse (315213211342), we get a palindrome (558325523855).

The spelling of 243112312513 in words is "two hundred forty-three billion, one hundred twelve million, three hundred twelve thousand, five hundred thirteen".