243113101031 has 4 divisors (see below), whose sum is σ = 243270051000. Its totient is φ = 242956151064.

The previous prime is 243113101009. The next prime is 243113101039. The reversal of 243113101031 is 130101311342.

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

It is a cyclic number.

It is not a de Polignac number, because 243113101031 - 2¹⁰ = 243113100007 is a prime.

It is a super-2 number, since 2×243113101031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243113100994 and 243113101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243113101039) 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, 78472661 + ... + 78475758.

It is an arithmetic number, because the mean of its divisors is an integer number (60817512750).

Almost surely, 2^243113101031 is an apocalyptic number.

243113101031 is a deficient number, since it is larger than the sum of its proper divisors (156949969).

243113101031 is a wasteful number, since it uses less digits than its factorization.

243113101031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156949968.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 243113101031 its reverse (130101311342), we get a palindrome (373214412373).

The spelling of 243113101031 in words is "two hundred forty-three billion, one hundred thirteen million, one hundred one thousand, thirty-one".