31243004423 has 2 divisors, whose sum is σ = 31243004424. Its totient is φ = 31243004422.

The previous prime is 31243004197. The next prime is 31243004437. The reversal of 31243004423 is 32440034213.

It is a strong prime.

It is an emirp because it is prime and its reverse (32440034213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31243004423 - 2¹⁰ = 31243003399 is a prime.

It is a super-6 number, since 6×31243004423⁶ (a number of 64 digits) contains 666666 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 31243004392 and 31243004401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31243004473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621502211 + 15621502212.

It is an arithmetic number, because the mean of its divisors is an integer number (15621502212).

Almost surely, 2^31243004423 is an apocalyptic number.

31243004423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31243004423 is an equidigital number, since it uses as much as digits as its factorization.

31243004423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31243004423 its reverse (32440034213), we get a palindrome (63683038636).

The spelling of 31243004423 in words is "thirty-one billion, two hundred forty-three million, four thousand, four hundred twenty-three".