243320356 has 6 divisors (see below), whose sum is σ = 425810630. Its totient is φ = 121660176.

The previous prime is 243320351. The next prime is 243320377. The reversal of 243320356 is 653023342.

It can be written as a sum of positive squares in only one way, i.e., 224100900 + 19219456 = 14970^2 + 4384^2 .

It is not an unprimeable number, because it can be changed into a prime (243320351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30415041 + ... + 30415048.

Almost surely, 2^243320356 is an apocalyptic number.

It is an amenable number.

243320356 is a deficient number, since it is larger than the sum of its proper divisors (182490274).

243320356 is a wasteful number, since it uses less digits than its factorization.

243320356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60830093 (or 60830091 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 243320356 is about 15598.7293072224. The cubic root of 243320356 is about 624.2992517366.

Adding to 243320356 its reverse (653023342), we get a palindrome (896343698).

The spelling of 243320356 in words is "two hundred forty-three million, three hundred twenty thousand, three hundred fifty-six".