67311581213 has 2 divisors, whose sum is σ = 67311581214. Its totient is φ = 67311581212.

The previous prime is 67311581179. The next prime is 67311581221. The reversal of 67311581213 is 31218511376.

67311581213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53354994169 + 13956587044 = 230987^2 + 118138^2 .

It is a cyclic number.

It is not a de Polignac number, because 67311581213 - 2¹² = 67311577117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67311586213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33655790606 + 33655790607.

It is an arithmetic number, because the mean of its divisors is an integer number (33655790607).

Almost surely, 2^67311581213 is an apocalyptic number.

It is an amenable number.

67311581213 is a deficient number, since it is larger than the sum of its proper divisors (1).

67311581213 is an equidigital number, since it uses as much as digits as its factorization.

67311581213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The spelling of 67311581213 in words is "sixty-seven billion, three hundred eleven million, five hundred eighty-one thousand, two hundred thirteen".