213444525444317 has 2 divisors, whose sum is σ = 213444525444318. Its totient is φ = 213444525444316.

The previous prime is 213444525444299. The next prime is 213444525444323. The reversal of 213444525444317 is 713444525444312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204405038226841 + 9039487217476 = 14297029^2 + 3006574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213444525444317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213444525444347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106722262722158 + 106722262722159.

It is an arithmetic number, because the mean of its divisors is an integer number (106722262722159).

Almost surely, 2^{213444525444317} is an apocalyptic number.

It is an amenable number.

213444525444317 is a deficient number, since it is larger than the sum of its proper divisors (1).

213444525444317 is an equidigital number, since it uses as much as digits as its factorization.

213444525444317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25804800, while the sum is 53.

The spelling of 213444525444317 in words is "two hundred thirteen trillion, four hundred forty-four billion, five hundred twenty-five million, four hundred forty-four thousand, three hundred seventeen".