212434403 has 2 divisors, whose sum is σ = 212434404. Its totient is φ = 212434402.

The previous prime is 212434399. The next prime is 212434471. The reversal of 212434403 is 304434212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212434403 - 2² = 212434399 is a prime.

It is not a weakly prime, because it can be changed into another prime (212434903) 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, 106217201 + 106217202.

It is an arithmetic number, because the mean of its divisors is an integer number (106217202).

Almost surely, 2^212434403 is an apocalyptic number.

212434403 is a deficient number, since it is larger than the sum of its proper divisors (1).

212434403 is an equidigital number, since it uses as much as digits as its factorization.

212434403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 212434403 is about 14575.1296049126. The cubic root of 212434403 is about 596.6801865723.

Adding to 212434403 its reverse (304434212), we get a palindrome (516868615).

The spelling of 212434403 in words is "two hundred twelve million, four hundred thirty-four thousand, four hundred three".