31323500609 has 2 divisors, whose sum is σ = 31323500610. Its totient is φ = 31323500608.

The previous prime is 31323500519. The next prime is 31323500617. The reversal of 31323500609 is 90600532313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29232450625 + 2091049984 = 170975^2 + 45728^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31323500609 is a prime.

It is not a weakly prime, because it can be changed into another prime (31323500309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661750304 + 15661750305.

It is an arithmetic number, because the mean of its divisors is an integer number (15661750305).

Almost surely, 2^31323500609 is an apocalyptic number.

It is an amenable number.

31323500609 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323500609 is an equidigital number, since it uses as much as digits as its factorization.

31323500609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 32.

The spelling of 31323500609 in words is "thirty-one billion, three hundred twenty-three million, five hundred thousand, six hundred nine".