221042529344 has 56 divisors (see below), whose sum is σ = 539853883968. Its totient is φ = 87445393920.

The previous prime is 221042529341. The next prime is 221042529401. The reversal of 221042529344 is 443925240122.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 221042529298 and 221042529307.

It is not an unprimeable number, because it can be changed into a prime (221042529341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18971042 + ... + 18982689.

It is an arithmetic number, because the mean of its divisors is an integer number (9640247928).

Almost surely, 2^221042529344 is an apocalyptic number.

It is an amenable number.

221042529344 is an abundant number, since it is smaller than the sum of its proper divisors (318811354624).

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

221042529344 is a wasteful number, since it uses less digits than its factorization.

221042529344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37953763 (or 37953753 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 221042529344 its reverse (443925240122), we get a palindrome (664967769466).

The spelling of 221042529344 in words is "two hundred twenty-one billion, forty-two million, five hundred twenty-nine thousand, three hundred forty-four".