16256317213 has 2 divisors, whose sum is σ = 16256317214. Its totient is φ = 16256317212.

The previous prime is 16256317163. The next prime is 16256317219. The reversal of 16256317213 is 31271365261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15103918404 + 1152398809 = 122898^2 + 33947^2 .

It is a cyclic number.

It is not a de Polignac number, because 16256317213 - 2⁹ = 16256316701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16256317219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8128158606 + 8128158607.

It is an arithmetic number, because the mean of its divisors is an integer number (8128158607).

Almost surely, 2^16256317213 is an apocalyptic number.

It is an amenable number.

16256317213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16256317213 is an equidigital number, since it uses as much as digits as its factorization.

16256317213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

It can be divided in two parts, 162563 and 17213, that added together give a square (179776 = 424²).

The spelling of 16256317213 in words is "sixteen billion, two hundred fifty-six million, three hundred seventeen thousand, two hundred thirteen".