31305040523 has 2 divisors, whose sum is σ = 31305040524. Its totient is φ = 31305040522.

The previous prime is 31305040517. The next prime is 31305040567. The reversal of 31305040523 is 32504050313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31305040523 - 2⁸ = 31305040267 is a prime.

It is a super-2 number, since 2×31305040523² (a number of 22 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 = 31305040492 and 31305040501.

It is not a weakly prime, because it can be changed into another prime (31305040573) 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, 15652520261 + 15652520262.

It is an arithmetic number, because the mean of its divisors is an integer number (15652520262).

Almost surely, 2^31305040523 is an apocalyptic number.

31305040523 is a deficient number, since it is larger than the sum of its proper divisors (1).

31305040523 is an equidigital number, since it uses as much as digits as its factorization.

31305040523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 26.

Adding to 31305040523 its reverse (32504050313), we get a palindrome (63809090836).

The spelling of 31305040523 in words is "thirty-one billion, three hundred five million, forty thousand, five hundred twenty-three".