213256541369 has 2 divisors, whose sum is σ = 213256541370. Its totient is φ = 213256541368.

The previous prime is 213256541363. The next prime is 213256541453. The reversal of 213256541369 is 963145652312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213185358400 + 71182969 = 461720^2 + 8437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213256541369 is a prime.

It is a super-2 number, since 2×213256541369² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213256541363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106628270684 + 106628270685.

It is an arithmetic number, because the mean of its divisors is an integer number (106628270685).

Almost surely, 2^213256541369 is an apocalyptic number.

It is an amenable number.

213256541369 is a deficient number, since it is larger than the sum of its proper divisors (1).

213256541369 is an equidigital number, since it uses as much as digits as its factorization.

213256541369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 47.

The spelling of 213256541369 in words is "two hundred thirteen billion, two hundred fifty-six million, five hundred forty-one thousand, three hundred sixty-nine".