243213122 has 16 divisors (see below), whose sum is σ = 368504640. Its totient is φ = 120384528.

The previous prime is 243213121. The next prime is 243213143. The reversal of 243213122 is 221312342.

It is a junction number, because it is equal to n+sod(n) for n = 243213094 and 243213103.

It is not an unprimeable number, because it can be changed into a prime (243213121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88493 + ... + 91199.

It is an arithmetic number, because the mean of its divisors is an integer number (23031540).

Almost surely, 2^243213122 is an apocalyptic number.

243213122 is a deficient number, since it is larger than the sum of its proper divisors (125291518).

243213122 is a wasteful number, since it uses less digits than its factorization.

243213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145.

The product of its digits is 576, while the sum is 20.

The square root of 243213122 is about 15595.2916612675. The cubic root of 243213122 is about 624.2075263749.

Adding to 243213122 its reverse (221312342), we get a palindrome (464525464).

The spelling of 243213122 in words is "two hundred forty-three million, two hundred thirteen thousand, one hundred twenty-two".