213115314197 has 2 divisors, whose sum is σ = 213115314198. Its totient is φ = 213115314196.

The previous prime is 213115314179. The next prime is 213115314199. The reversal of 213115314197 is 791413511312.

Together with previous prime (213115314179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112997494801 + 100117819396 = 336151^2 + 316414^2 .

It is a cyclic number.

It is not a de Polignac number, because 213115314197 - 2¹² = 213115310101 is a prime.

Together with 213115314199, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213115314197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213115314199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106557657098 + 106557657099.

It is an arithmetic number, because the mean of its divisors is an integer number (106557657099).

Almost surely, 2^213115314197 is an apocalyptic number.

It is an amenable number.

213115314197 is a deficient number, since it is larger than the sum of its proper divisors (1).

213115314197 is an equidigital number, since it uses as much as digits as its factorization.

213115314197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The spelling of 213115314197 in words is "two hundred thirteen billion, one hundred fifteen million, three hundred fourteen thousand, one hundred ninety-seven".