243311113153 has 4 divisors (see below), whose sum is σ = 247299819988. Its totient is φ = 239322406320.

The previous prime is 243311113139. The next prime is 243311113163. The reversal of 243311113153 is 351311113342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101459449729 + 141851663424 = 318527^2 + 376632^2 .

It is a cyclic number.

It is not a de Polignac number, because 243311113153 - 2¹³ = 243311104961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243311113103) 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, 1994353326 + ... + 1994353447.

It is an arithmetic number, because the mean of its divisors is an integer number (61824954997).

Almost surely, 2^243311113153 is an apocalyptic number.

It is an amenable number.

243311113153 is a deficient number, since it is larger than the sum of its proper divisors (3988706835).

243311113153 is an equidigital number, since it uses as much as digits as its factorization.

243311113153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988706834.

The product of its digits is 3240, while the sum is 28.

Adding to 243311113153 its reverse (351311113342), we get a palindrome (594622226495).

The spelling of 243311113153 in words is "two hundred forty-three billion, three hundred eleven million, one hundred thirteen thousand, one hundred fifty-three".