213516673 has 2 divisors, whose sum is σ = 213516674. Its totient is φ = 213516672.

The previous prime is 213516637. The next prime is 213516679. The reversal of 213516673 is 376615312.

Together with previous prime (213516637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196476289 + 17040384 = 14017^2 + 4128^2 .

It is a cyclic number.

It is not a de Polignac number, because 213516673 - 2⁹ = 213516161 is a prime.

It is not a weakly prime, because it can be changed into another prime (213516679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106758336 + 106758337.

It is an arithmetic number, because the mean of its divisors is an integer number (106758337).

Almost surely, 2^213516673 is an apocalyptic number.

It is an amenable number.

213516673 is a deficient number, since it is larger than the sum of its proper divisors (1).

213516673 is an equidigital number, since it uses as much as digits as its factorization.

213516673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 213516673 is about 14612.2097233786. The cubic root of 213516673 is about 597.6917545403.

The spelling of 213516673 in words is "two hundred thirteen million, five hundred sixteen thousand, six hundred seventy-three".