221050343540 has 24 divisors (see below), whose sum is σ = 499913854440. Its totient is φ = 81618588288.

The previous prime is 221050343539. The next prime is 221050343561. The reversal of 221050343540 is 45343050122.

It is a happy number.

221050343540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3375842404 + 217674501136 = 58102^2 + 466556^2 .

It is a congruent number.

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, 425096555 + ... + 425097074.

It is an arithmetic number, because the mean of its divisors is an integer number (20829743935).

Almost surely, 2^221050343540 is an apocalyptic number.

221050343540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221050343540 is an abundant number, since it is smaller than the sum of its proper divisors (278863510900).

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

221050343540 is a wasteful number, since it uses less digits than its factorization.

221050343540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850193651 (or 850193649 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 221050343540 its reverse (45343050122), we get a palindrome (266393393662).

The spelling of 221050343540 in words is "two hundred twenty-one billion, fifty million, three hundred forty-three thousand, five hundred forty".