221052515044 has 12 divisors (see below), whose sum is σ = 386862380604. Its totient is φ = 110520406304.

The previous prime is 221052515041. The next prime is 221052515053. The reversal of 221052515044 is 440515250122.

It can be written as a sum of positive squares in 2 ways, for example, as 40044812544 + 181007702500 = 200112^2 + 425450^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221052514997 and 221052515015.

It is not an unprimeable number, because it can be changed into a prime (221052515041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377247 + ... + 1529350.

It is an arithmetic number, because the mean of its divisors is an integer number (32238531717).

Almost surely, 2^221052515044 is an apocalyptic number.

It is an amenable number.

221052515044 is a deficient number, since it is larger than the sum of its proper divisors (165809865560).

221052515044 is a wasteful number, since it uses less digits than its factorization.

221052515044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925614 (or 2925612 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 221052515044 its reverse (440515250122), we get a palindrome (661567765166).

The spelling of 221052515044 in words is "two hundred twenty-one billion, fifty-two million, five hundred fifteen thousand, forty-four".