10213517309 has 2 divisors, whose sum is σ = 10213517310. Its totient is φ = 10213517308.

The previous prime is 10213517299. The next prime is 10213517341. The reversal of 10213517309 is 90371531201.

It is an a-pointer prime, because the next prime (10213517341) can be obtained adding 10213517309 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10122372100 + 91145209 = 100610^2 + 9547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10213517309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10213517399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106758654 + 5106758655.

It is an arithmetic number, because the mean of its divisors is an integer number (5106758655).

Almost surely, 2^10213517309 is an apocalyptic number.

It is an amenable number.

10213517309 is a deficient number, since it is larger than the sum of its proper divisors (1).

10213517309 is an equidigital number, since it uses as much as digits as its factorization.

10213517309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 32.

The spelling of 10213517309 in words is "ten billion, two hundred thirteen million, five hundred seventeen thousand, three hundred nine".