213130432031173 has 2 divisors, whose sum is σ = 213130432031174. Its totient is φ = 213130432031172.

The previous prime is 213130432031117. The next prime is 213130432031189. The reversal of 213130432031173 is 371130234031312.

213130432031173 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., 204216875459809 + 8913556571364 = 14290447^2 + 2985558^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130432031173 - 2³⁷ = 212992993077701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213130432034173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565216015586 + 106565216015587.

It is an arithmetic number, because the mean of its divisors is an integer number (106565216015587).

Almost surely, 2^{213130432031173} is an apocalyptic number.

It is an amenable number.

213130432031173 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130432031173 is an equidigital number, since it uses as much as digits as its factorization.

213130432031173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

Adding to 213130432031173 its reverse (371130234031312), we get a palindrome (584260666062485).

The spelling of 213130432031173 in words is "two hundred thirteen trillion, one hundred thirty billion, four hundred thirty-two million, thirty-one thousand, one hundred seventy-three".