31118282450989 has 2 divisors, whose sum is σ = 31118282450990. Its totient is φ = 31118282450988.

The previous prime is 31118282450951. The next prime is 31118282450993. The reversal of 31118282450989 is 98905428281113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26736448732900 + 4381833718089 = 5170730^2 + 2093283^2 .

It is a cyclic number.

It is not a de Polignac number, because 31118282450989 - 2⁹ = 31118282450477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31118282457989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559141225494 + 15559141225495.

It is an arithmetic number, because the mean of its divisors is an integer number (15559141225495).

Almost surely, 2^{31118282450989} is an apocalyptic number.

It is an amenable number.

31118282450989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31118282450989 is an equidigital number, since it uses as much as digits as its factorization.

31118282450989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 61.

The spelling of 31118282450989 in words is "thirty-one trillion, one hundred eighteen billion, two hundred eighty-two million, four hundred fifty thousand, nine hundred eighty-nine".