212388019 has 2 divisors, whose sum is σ = 212388020. Its totient is φ = 212388018.

The previous prime is 212387941. The next prime is 212388041. The reversal of 212388019 is 910883212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212388019 - 2⁹ = 212387507 is a prime.

It is a super-2 number, since 2×212388019² = 90217341229488722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212388079) 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, 106194009 + 106194010.

It is an arithmetic number, because the mean of its divisors is an integer number (106194010).

Almost surely, 2^212388019 is an apocalyptic number.

212388019 is a deficient number, since it is larger than the sum of its proper divisors (1).

212388019 is an equidigital number, since it uses as much as digits as its factorization.

212388019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 212388019 is about 14573.5383143559. The cubic root of 212388019 is about 596.6367560231.

The spelling of 212388019 in words is "two hundred twelve million, three hundred eighty-eight thousand, nineteen".