243312103031 has 2 divisors, whose sum is σ = 243312103032. Its totient is φ = 243312103030.

The previous prime is 243312102961. The next prime is 243312103039. The reversal of 243312103031 is 130301213342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243312103031 is a prime.

It is a super-2 number, since 2×243312103031² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 243312102988 and 243312103006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243312103039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121656051515 + 121656051516.

It is an arithmetic number, because the mean of its divisors is an integer number (121656051516).

Almost surely, 2^243312103031 is an apocalyptic number.

243312103031 is a deficient number, since it is larger than the sum of its proper divisors (1).

243312103031 is an equidigital number, since it uses as much as digits as its factorization.

243312103031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 243312103031 its reverse (130301213342), we get a palindrome (373613316373).

The spelling of 243312103031 in words is "two hundred forty-three billion, three hundred twelve million, one hundred three thousand, thirty-one".