243201255415 has 16 divisors (see below), whose sum is σ = 292259661408. Its totient is φ = 194282361856.

The previous prime is 243201255413. The next prime is 243201255487. The reversal of 243201255415 is 514552102342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243201255415 - 2¹ = 243201255413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201255413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31203759 + ... + 31211551.

It is an arithmetic number, because the mean of its divisors is an integer number (18266228838).

Almost surely, 2^243201255415 is an apocalyptic number.

243201255415 is a deficient number, since it is larger than the sum of its proper divisors (49058405993).

243201255415 is an equidigital number, since it uses as much as digits as its factorization.

243201255415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15938.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 243201255415 its reverse (514552102342), we get a palindrome (757753357757).

The spelling of 243201255415 in words is "two hundred forty-three billion, two hundred one million, two hundred fifty-five thousand, four hundred fifteen".