31241302009 has 2 divisors, whose sum is σ = 31241302010. Its totient is φ = 31241302008.

The previous prime is 31241301977. The next prime is 31241302039. The reversal of 31241302009 is 90020314213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28132681984 + 3108620025 = 167728^2 + 55755^2 .

It is a cyclic number.

It is not a de Polignac number, because 31241302009 - 2⁵ = 31241301977 is a prime.

It is not a weakly prime, because it can be changed into another prime (31241302039) 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, 15620651004 + 15620651005.

It is an arithmetic number, because the mean of its divisors is an integer number (15620651005).

Almost surely, 2^31241302009 is an apocalyptic number.

It is an amenable number.

31241302009 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241302009 is an equidigital number, since it uses as much as digits as its factorization.

31241302009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 31241302009 in words is "thirty-one billion, two hundred forty-one million, three hundred two thousand, nine".