213555229 has 2 divisors, whose sum is σ = 213555230. Its totient is φ = 213555228.

The previous prime is 213555227. The next prime is 213555239. The reversal of 213555229 is 922555312.

213555229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200788900 + 12766329 = 14170^2 + 3573^2 .

It is a cyclic number.

It is not a de Polignac number, because 213555229 - 2¹ = 213555227 is a prime.

Together with 213555227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 213555194 and 213555203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213555227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106777614 + 106777615.

It is an arithmetic number, because the mean of its divisors is an integer number (106777615).

Almost surely, 2^213555229 is an apocalyptic number.

It is an amenable number.

213555229 is a deficient number, since it is larger than the sum of its proper divisors (1).

213555229 is an equidigital number, since it uses as much as digits as its factorization.

213555229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 34.

The square root of 213555229 is about 14613.5289714702. The cubic root of 213555229 is about 597.7277286495.

The spelling of 213555229 in words is "two hundred thirteen million, five hundred fifty-five thousand, two hundred twenty-nine".