212838229 has 2 divisors, whose sum is σ = 212838230. Its totient is φ = 212838228.

The previous prime is 212838187. The next prime is 212838233. The reversal of 212838229 is 922838212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171557604 + 41280625 = 13098^2 + 6425^2 .

It is a cyclic number.

It is not a de Polignac number, because 212838229 - 2⁹ = 212837717 is a prime.

It is a super-2 number, since 2×212838229² = 90600223447712882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212838239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106419114 + 106419115.

It is an arithmetic number, because the mean of its divisors is an integer number (106419115).

Almost surely, 2^212838229 is an apocalyptic number.

It is an amenable number.

212838229 is a deficient number, since it is larger than the sum of its proper divisors (1).

212838229 is an equidigital number, since it uses as much as digits as its factorization.

212838229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 212838229 is about 14588.9762834820. The cubic root of 212838229 is about 597.0580325489.

The spelling of 212838229 in words is "two hundred twelve million, eight hundred thirty-eight thousand, two hundred twenty-nine".