243201015556 has 12 divisors (see below), whose sum is σ = 426339392668. Its totient is φ = 121389760512.

The previous prime is 243201015529. The next prime is 243201015583. The reversal of 243201015556 is 655510102342.

It is an interprime number because it is at equal distance from previous prime (243201015529) and next prime (243201015583).

It can be written as a sum of positive squares in 2 ways, for example, as 131671733956 + 111529281600 = 362866^2 + 333960^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52684221 + ... + 52688836.

Almost surely, 2^243201015556 is an apocalyptic number.

It is an amenable number.

243201015556 is a deficient number, since it is larger than the sum of its proper divisors (183138377112).

243201015556 is a wasteful number, since it uses less digits than its factorization.

243201015556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105373638 (or 105373636 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 243201015556 its reverse (655510102342), we get a palindrome (898711117898).

The spelling of 243201015556 in words is "two hundred forty-three billion, two hundred one million, fifteen thousand, five hundred fifty-six".