31102085489 has 2 divisors, whose sum is σ = 31102085490. Its totient is φ = 31102085488.

The previous prime is 31102085461. The next prime is 31102085527. The reversal of 31102085489 is 98458020113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23219664400 + 7882421089 = 152380^2 + 88783^2 .

It is a cyclic number.

It is not a de Polignac number, because 31102085489 - 2¹² = 31102081393 is a prime.

It is not a weakly prime, because it can be changed into another prime (31102085419) 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, 15551042744 + 15551042745.

It is an arithmetic number, because the mean of its divisors is an integer number (15551042745).

Almost surely, 2^31102085489 is an apocalyptic number.

It is an amenable number.

31102085489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102085489 is an equidigital number, since it uses as much as digits as its factorization.

31102085489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 31102085489 in words is "thirty-one billion, one hundred two million, eighty-five thousand, four hundred eighty-nine".