212243029 has 2 divisors, whose sum is σ = 212243030. Its totient is φ = 212243028.

The previous prime is 212243021. The next prime is 212243077. The reversal of 212243029 is 920342212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154330929 + 57912100 = 12423^2 + 7610^2 .

It is a cyclic number.

It is not a de Polignac number, because 212243029 - 2³ = 212243021 is a prime.

It is equal to p_11718511 and since 212243029 and 11718511 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 212242994 and 212243012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212243021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121514 + 106121515.

It is an arithmetic number, because the mean of its divisors is an integer number (106121515).

Almost surely, 2^212243029 is an apocalyptic number.

It is an amenable number.

212243029 is a deficient number, since it is larger than the sum of its proper divisors (1).

212243029 is an equidigital number, since it uses as much as digits as its factorization.

212243029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 212243029 is about 14568.5630382684. The cubic root of 212243029 is about 596.5009573151.

The spelling of 212243029 in words is "two hundred twelve million, two hundred forty-three thousand, twenty-nine".