31440202110217 has 2 divisors, whose sum is σ = 31440202110218. Its totient is φ = 31440202110216.

The previous prime is 31440202110181. The next prime is 31440202110269. The reversal of 31440202110217 is 71201120204413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30052280144016 + 1387921966201 = 5481996^2 + 1178101^2 .

It is an emirp because it is prime and its reverse (71201120204413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31440202110217 - 2⁷ = 31440202110089 is a prime.

It is not a weakly prime, because it can be changed into another prime (31440202110277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720101055108 + 15720101055109.

It is an arithmetic number, because the mean of its divisors is an integer number (15720101055109).

Almost surely, 2^{31440202110217} is an apocalyptic number.

It is an amenable number.

31440202110217 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440202110217 is an equidigital number, since it uses as much as digits as its factorization.

31440202110217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 31440202110217 in words is "thirty-one trillion, four hundred forty billion, two hundred two million, one hundred ten thousand, two hundred seventeen".