613220213 has 2 divisors, whose sum is σ = 613220214. Its totient is φ = 613220212.

The previous prime is 613220197. The next prime is 613220249. The reversal of 613220213 is 312022316.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511754884 + 101465329 = 22622^2 + 10073^2 .

It is a cyclic number.

It is not a de Polignac number, because 613220213 - 2⁴ = 613220197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (613222213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306610106 + 306610107.

It is an arithmetic number, because the mean of its divisors is an integer number (306610107).

Almost surely, 2^613220213 is an apocalyptic number.

It is an amenable number.

613220213 is a deficient number, since it is larger than the sum of its proper divisors (1).

613220213 is an equidigital number, since it uses as much as digits as its factorization.

613220213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 613220213 is about 24763.2835666032. The cubic root of 613220213 is about 849.5823613826.

Adding to 613220213 its reverse (312022316), we get a palindrome (925242529).

The spelling of 613220213 in words is "six hundred thirteen million, two hundred twenty thousand, two hundred thirteen".