243155213056 has 72 divisors (see below), whose sum is σ = 555043376160. Its totient is φ = 104144461824.

The previous prime is 243155213033. The next prime is 243155213087. The reversal of 243155213056 is 650312551342.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2892060 + ... + 2974948.

It is an arithmetic number, because the mean of its divisors is an integer number (7708935780).

Almost surely, 2^243155213056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243155213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277521688080).

243155213056 is an abundant number, since it is smaller than the sum of its proper divisors (311888163104).

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

243155213056 is an equidigital number, since it uses as much as digits as its factorization.

243155213056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84549 (or 84535 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 243155213056 its reverse (650312551342), we get a palindrome (893467764398).

The spelling of 243155213056 in words is "two hundred forty-three billion, one hundred fifty-five million, two hundred thirteen thousand, fifty-six".