31310002481 has 2 divisors, whose sum is σ = 31310002482. Its totient is φ = 31310002480.

The previous prime is 31310002441. The next prime is 31310002483. The reversal of 31310002481 is 18420001313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27883656256 + 3426346225 = 166984^2 + 58535^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310002481 - 2¹⁸ = 31309740337 is a prime.

It is a super-2 number, since 2×31310002481² (a number of 22 digits) contains 22 as substring.

Together with 31310002483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31310002483) 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, 15655001240 + 15655001241.

It is an arithmetic number, because the mean of its divisors is an integer number (15655001241).

Almost surely, 2^31310002481 is an apocalyptic number.

It is an amenable number.

31310002481 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310002481 is an equidigital number, since it uses as much as digits as its factorization.

31310002481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 31310002481 its reverse (18420001313), we get a palindrome (49730003794).

The spelling of 31310002481 in words is "thirty-one billion, three hundred ten million, two thousand, four hundred eighty-one".