212257229 has 2 divisors, whose sum is σ = 212257230. Its totient is φ = 212257228.

The previous prime is 212257219. The next prime is 212257231. The reversal of 212257229 is 922752212.

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., 151339204 + 60918025 = 12302^2 + 7805^2 .

It is a cyclic number.

It is not a de Polignac number, because 212257229 - 2¹² = 212253133 is a prime.

Together with 212257231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212257195 and 212257204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212257219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106128614 + 106128615.

It is an arithmetic number, because the mean of its divisors is an integer number (106128615).

Almost surely, 2^212257229 is an apocalyptic number.

It is an amenable number.

212257229 is a deficient number, since it is larger than the sum of its proper divisors (1).

212257229 is an equidigital number, since it uses as much as digits as its factorization.

212257229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 212257229 is about 14569.0503808587. The cubic root of 212257229 is about 596.5142598717.

The spelling of 212257229 in words is "two hundred twelve million, two hundred fifty-seven thousand, two hundred twenty-nine".