243212103 has 12 divisors (see below), whose sum is σ = 369796440. Its totient is φ = 153607536.

The previous prime is 243212093. The next prime is 243212107. The reversal of 243212103 is 301212342.

It is not a de Polignac number, because 243212103 - 2¹⁶ = 243146567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243212107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 710976 + ... + 711317.

It is an arithmetic number, because the mean of its divisors is an integer number (30816370).

Almost surely, 2^243212103 is an apocalyptic number.

243212103 is a deficient number, since it is larger than the sum of its proper divisors (126584337).

243212103 is a wasteful number, since it uses less digits than its factorization.

243212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422318 (or 1422315 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 243212103 is about 15595.2589911165. The cubic root of 243212103 is about 624.2066546177.

Adding to 243212103 its reverse (301212342), we get a palindrome (544424445).

It can be divided in two parts, 2432 and 12103, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 243212103 in words is "two hundred forty-three million, two hundred twelve thousand, one hundred three".