31311012103289 has 2 divisors, whose sum is σ = 31311012103290. Its totient is φ = 31311012103288.

The previous prime is 31311012103253. The next prime is 31311012103333. The reversal of 31311012103289 is 98230121011313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31156401931264 + 154610172025 = 5581792^2 + 393205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311012103289 is a prime.

It is not a weakly prime, because it can be changed into another prime (31311012103249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655506051644 + 15655506051645.

It is an arithmetic number, because the mean of its divisors is an integer number (15655506051645).

Almost surely, 2^{31311012103289} is an apocalyptic number.

It is an amenable number.

31311012103289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311012103289 is an equidigital number, since it uses as much as digits as its factorization.

31311012103289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 31311012103289 in words is "thirty-one trillion, three hundred eleven billion, twelve million, one hundred three thousand, two hundred eighty-nine".