243216426 has 32 divisors (see below), whose sum is σ = 491079168. Its totient is φ = 80302320.

The previous prime is 243216419. The next prime is 243216437. The reversal of 243216426 is 624612342.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243216393 and 243216402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385131 + ... + 385761.

It is an arithmetic number, because the mean of its divisors is an integer number (15346224).

Almost surely, 2^243216426 is an apocalyptic number.

243216426 is an abundant number, since it is smaller than the sum of its proper divisors (247862742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243216426 is a wasteful number, since it uses less digits than its factorization.

243216426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its digits is 13824, while the sum is 30.

The square root of 243216426 is about 15595.3975903149. The cubic root of 243216426 is about 624.2103529389.

Adding to 243216426 its reverse (624612342), we get a palindrome (867828768).

The spelling of 243216426 in words is "two hundred forty-three million, two hundred sixteen thousand, four hundred twenty-six".