243331213013 has 4 divisors (see below), whose sum is σ = 278092814880. Its totient is φ = 208569611148.

The previous prime is 243331212989. The next prime is 243331213033. The reversal of 243331213013 is 310312133342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243331213013 - 2⁸ = 243331212757 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 (243331213033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17380800923 + ... + 17380800936.

It is an arithmetic number, because the mean of its divisors is an integer number (69523203720).

Almost surely, 2^243331213013 is an apocalyptic number.

It is an amenable number.

243331213013 is a deficient number, since it is larger than the sum of its proper divisors (34761601867).

243331213013 is an equidigital number, since it uses as much as digits as its factorization.

243331213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34761601866.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 243331213013 its reverse (310312133342), we get a palindrome (553643346355).

The spelling of 243331213013 in words is "two hundred forty-three billion, three hundred thirty-one million, two hundred thirteen thousand, thirteen".