243220316 has 6 divisors (see below), whose sum is σ = 425635560. Its totient is φ = 121610156.

The previous prime is 243220291. The next prime is 243220319. The reversal of 243220316 is 613022342.

It is a super-2 number, since 2×243220316² = 118312244230279712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243220291 and 243220300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243220319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30402536 + ... + 30402543.

It is an arithmetic number, because the mean of its divisors is an integer number (70939260).

Almost surely, 2^243220316 is an apocalyptic number.

It is an amenable number.

243220316 is a deficient number, since it is larger than the sum of its proper divisors (182415244).

243220316 is a wasteful number, since it uses less digits than its factorization.

243220316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60805083 (or 60805081 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 243220316 is about 15595.5223060980. The cubic root of 243220316 is about 624.2136807916.

Adding to 243220316 its reverse (613022342), we get a palindrome (856242658).

The spelling of 243220316 in words is "two hundred forty-three million, two hundred twenty thousand, three hundred sixteen".