215443212544 has 108 divisors (see below), whose sum is σ = 502044739308. Its totient is φ = 92002713600.

The previous prime is 215443212529. The next prime is 215443212547. The reversal of 215443212544 is 445212344512.

It can be written as a sum of positive squares in 2 ways, for example, as 57446502400 + 157996710144 = 239680^2 + 397488^2 .

It is not an unprimeable number, because it can be changed into a prime (215443212547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3494304 + ... + 3555424.

It is an arithmetic number, because the mean of its divisors is an integer number (4648562401).

Almost surely, 2^215443212544 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 215443212544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251022369654).

215443212544 is an abundant number, since it is smaller than the sum of its proper divisors (286601526764).

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

215443212544 is an equidigital number, since it uses as much as digits as its factorization.

215443212544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61432 (or 61411 counting only the distinct ones).

The product of its digits is 153600, while the sum is 37.

The spelling of 215443212544 in words is "two hundred fifteen billion, four hundred forty-three million, two hundred twelve thousand, five hundred forty-four".