243011315320 has 64 divisors (see below), whose sum is σ = 549455800320. Its totient is φ = 96728390784.

The previous prime is 243011315293. The next prime is 243011315329. The reversal of 243011315320 is 23513110342.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243011315329) 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, 30886027 + ... + 30893893.

It is an arithmetic number, because the mean of its divisors is an integer number (8585246880).

Almost surely, 2^243011315320 is an apocalyptic number.

243011315320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243011315320 is an abundant number, since it is smaller than the sum of its proper divisors (306444485000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243011315320 is a wasteful number, since it uses less digits than its factorization.

243011315320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11564 (or 11560 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 243011315320 its reverse (23513110342), we get a palindrome (266524425662).

The spelling of 243011315320 in words is "two hundred forty-three billion, eleven million, three hundred fifteen thousand, three hundred twenty".