212430243 has 16 divisors (see below), whose sum is σ = 288759296. Its totient is φ = 138875040.

The previous prime is 212430221. The next prime is 212430269. The reversal of 212430243 is 342034212.

It is not a de Polignac number, because 212430243 - 2¹² = 212426147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212430443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65580 + ... + 68742.

It is an arithmetic number, because the mean of its divisors is an integer number (18047456).

Almost surely, 2^212430243 is an apocalyptic number.

212430243 is a deficient number, since it is larger than the sum of its proper divisors (76329053).

212430243 is a wasteful number, since it uses less digits than its factorization.

212430243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 212430243 is about 14574.9868953629. The cubic root of 212430243 is about 596.6762917138.

Adding to 212430243 its reverse (342034212), we get a palindrome (554464455).

The spelling of 212430243 in words is "two hundred twelve million, four hundred thirty thousand, two hundred forty-three".