243212416 has 32 divisors (see below), whose sum is σ = 485606700. Its totient is φ = 121334784.

The previous prime is 243212413. The next prime is 243212441. The reversal of 243212416 is 614212342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 234212416 + 9000000 = 15304^2 + 3000^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (243212413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63286 + ... + 67018.

Almost surely, 2^243212416 is an apocalyptic number.

It is an amenable number.

243212416 is a deficient number, since it is larger than the sum of its proper divisors (242394284).

243212416 is an equidigital number, since it uses as much as digits as its factorization.

243212416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256 (or 4244 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 243212416 is about 15595.2690262143. The cubic root of 243212416 is about 624.2069223903.

Adding to 243212416 its reverse (614212342), we get a palindrome (857424758).

The spelling of 243212416 in words is "two hundred forty-three million, two hundred twelve thousand, four hundred sixteen".