213371550745609 has 2 divisors, whose sum is σ = 213371550745610. Its totient is φ = 213371550745608.

The previous prime is 213371550745571. The next prime is 213371550745663. The reversal of 213371550745609 is 906547055173312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185038126648384 + 28333424097225 = 13602872^2 + 5322915^2 .

It is a cyclic number.

It is not a de Polignac number, because 213371550745609 - 2³⁷ = 213234111792137 is a prime.

It is not a weakly prime, because it can be changed into another prime (213371550745679) 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, 106685775372804 + 106685775372805.

It is an arithmetic number, because the mean of its divisors is an integer number (106685775372805).

Almost surely, 2^{213371550745609} is an apocalyptic number.

It is an amenable number.

213371550745609 is a deficient number, since it is larger than the sum of its proper divisors (1).

213371550745609 is an equidigital number, since it uses as much as digits as its factorization.

213371550745609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814000, while the sum is 58.

The spelling of 213371550745609 in words is "two hundred thirteen trillion, three hundred seventy-one billion, five hundred fifty million, seven hundred forty-five thousand, six hundred nine".