213130517 has 2 divisors, whose sum is σ = 213130518. Its totient is φ = 213130516.

The previous prime is 213130501. The next prime is 213130531. The reversal of 213130517 is 715031312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148986436 + 64144081 = 12206^2 + 8009^2 .

It is a cyclic number.

It is not a de Polignac number, because 213130517 - 2⁴ = 213130501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213130492 and 213130501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213130537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106565258 + 106565259.

It is an arithmetic number, because the mean of its divisors is an integer number (106565259).

Almost surely, 2^213130517 is an apocalyptic number.

It is an amenable number.

213130517 is a deficient number, since it is larger than the sum of its proper divisors (1).

213130517 is an equidigital number, since it uses as much as digits as its factorization.

213130517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 213130517 is about 14598.9902733032. The cubic root of 213130517 is about 597.3312182362.

Adding to 213130517 its reverse (715031312), we get a palindrome (928161829).

The spelling of 213130517 in words is "two hundred thirteen million, one hundred thirty thousand, five hundred seventeen".