671122213 has 2 divisors, whose sum is σ = 671122214. Its totient is φ = 671122212.

The previous prime is 671122201. The next prime is 671122219. The reversal of 671122213 is 312221176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412008804 + 259113409 = 20298^2 + 16097^2 .

It is a cyclic number.

It is not a de Polignac number, because 671122213 - 2⁹ = 671121701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671122219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335561106 + 335561107.

It is an arithmetic number, because the mean of its divisors is an integer number (335561107).

Almost surely, 2^671122213 is an apocalyptic number.

It is an amenable number.

671122213 is a deficient number, since it is larger than the sum of its proper divisors (1).

671122213 is an equidigital number, since it uses as much as digits as its factorization.

671122213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 671122213 is about 25906.0265768412. The cubic root of 671122213 is about 875.5222843244.

Adding to 671122213 its reverse (312221176), we get a palindrome (983343389).

The spelling of 671122213 in words is "six hundred seventy-one million, one hundred twenty-two thousand, two hundred thirteen".