31302031009 has 2 divisors, whose sum is σ = 31302031010. Its totient is φ = 31302031008.

The previous prime is 31302031003. The next prime is 31302031021. The reversal of 31302031009 is 90013020313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20033571600 + 11268459409 = 141540^2 + 106153^2 .

It is a cyclic number.

It is not a de Polignac number, because 31302031009 - 2²¹ = 31299933857 is a prime.

It is not a weakly prime, because it can be changed into another prime (31302031003) 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, 15651015504 + 15651015505.

It is an arithmetic number, because the mean of its divisors is an integer number (15651015505).

Almost surely, 2^31302031009 is an apocalyptic number.

It is an amenable number.

31302031009 is a deficient number, since it is larger than the sum of its proper divisors (1).

31302031009 is an equidigital number, since it uses as much as digits as its factorization.

31302031009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The spelling of 31302031009 in words is "thirty-one billion, three hundred two million, thirty-one thousand, nine".