31155455113 has 2 divisors, whose sum is σ = 31155455114. Its totient is φ = 31155455112.

The previous prime is 31155455087. The next prime is 31155455147.

31155455113 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (31155455147) can be obtained adding 31155455113 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25175216889 + 5980238224 = 158667^2 + 77332^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 31155455113 - 2²⁹ = 30618584201 is a prime.

It is not a weakly prime, because it can be changed into another prime (31155455213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15577727556 + 15577727557.

It is an arithmetic number, because the mean of its divisors is an integer number (15577727557).

Almost surely, 2^31155455113 is an apocalyptic number.

It is an amenable number.

31155455113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31155455113 is an equidigital number, since it uses as much as digits as its factorization.

31155455113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22500, while the sum is 34.

The spelling of 31155455113 in words is "thirty-one billion, one hundred fifty-five million, four hundred fifty-five thousand, one hundred thirteen".