31242424243 has 2 divisors, whose sum is σ = 31242424244. Its totient is φ = 31242424242.

The previous prime is 31242424231. The next prime is 31242424273. The reversal of 31242424243 is 34242424213.

It is a weak prime.

It is an emirp because it is prime and its reverse (34242424213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31242424243 is a prime.

It is not a weakly prime, because it can be changed into another prime (31242424273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621212121 + 15621212122.

It is an arithmetic number, because the mean of its divisors is an integer number (15621212122).

Almost surely, 2^31242424243 is an apocalyptic number.

31242424243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31242424243 is an equidigital number, since it uses as much as digits as its factorization.

31242424243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 31.

Adding to 31242424243 its reverse (34242424213), we get a palindrome (65484848456).

The spelling of 31242424243 in words is "thirty-one billion, two hundred forty-two million, four hundred twenty-four thousand, two hundred forty-three".