31013010109 has 2 divisors, whose sum is σ = 31013010110. Its totient is φ = 31013010108.

The previous prime is 31013010097. The next prime is 31013010151. The reversal of 31013010109 is 90101031013.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29154538009 + 1858472100 = 170747^2 + 43110^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013010109 - 2¹⁹ = 31012485821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31013019109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506505054 + 15506505055.

It is an arithmetic number, because the mean of its divisors is an integer number (15506505055).

Almost surely, 2^31013010109 is an apocalyptic number.

It is an amenable number.

31013010109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013010109 is an equidigital number, since it uses as much as digits as its factorization.

31013010109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 19.

The spelling of 31013010109 in words is "thirty-one billion, thirteen million, ten thousand, one hundred nine".