213612613 has 2 divisors, whose sum is σ = 213612614. Its totient is φ = 213612612.

The previous prime is 213612577. The next prime is 213612629. The reversal of 213612613 is 316216312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122257249 + 91355364 = 11057^2 + 9558^2 .

It is a cyclic number.

It is not a de Polignac number, because 213612613 - 2²⁵ = 180058181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213612653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106806306 + 106806307.

It is an arithmetic number, because the mean of its divisors is an integer number (106806307).

Almost surely, 2^213612613 is an apocalyptic number.

It is an amenable number.

213612613 is a deficient number, since it is larger than the sum of its proper divisors (1).

213612613 is an equidigital number, since it uses as much as digits as its factorization.

213612613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 213612613 is about 14615.4922257172. The cubic root of 213612613 is about 597.7812619304.

Adding to 213612613 its reverse (316216312), we get a palindrome (529828925).

The spelling of 213612613 in words is "two hundred thirteen million, six hundred twelve thousand, six hundred thirteen".