31240210204913 has 2 divisors, whose sum is σ = 31240210204914. Its totient is φ = 31240210204912.

The previous prime is 31240210204891. The next prime is 31240210204961. The reversal of 31240210204913 is 31940201204213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26172975098209 + 5067235106704 = 5115953^2 + 2251052^2 .

It is an emirp because it is prime and its reverse (31940201204213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31240210204913 - 2³⁶ = 31171490728177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31240210204913.

It is not a weakly prime, because it can be changed into another prime (31240210203913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620105102456 + 15620105102457.

It is an arithmetic number, because the mean of its divisors is an integer number (15620105102457).

Almost surely, 2^{31240210204913} is an apocalyptic number.

It is an amenable number.

31240210204913 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240210204913 is an equidigital number, since it uses as much as digits as its factorization.

31240210204913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 31240210204913 in words is "thirty-one trillion, two hundred forty billion, two hundred ten million, two hundred four thousand, nine hundred thirteen".