221572919432 has 36 divisors (see below), whose sum is σ = 418423445685. Its totient is φ = 109998946080.

The previous prime is 221572919429. The next prime is 221572919437. The reversal of 221572919432 is 234919275122.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 220067944996 + 1504974436 = 469114^2 + 38794^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332846.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221572919437) 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 8 ways as a sum of consecutive naturals, for example, 217015082 + ... + 217016102.

Almost surely, 2^221572919432 is an apocalyptic number.

It is an amenable number.

221572919432 is a deficient number, since it is larger than the sum of its proper divisors (196850526253).

221572919432 is an frugal number, since it uses more digits than its factorization.

221572919432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2374 (or 1186 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The spelling of 221572919432 in words is "two hundred twenty-one billion, five hundred seventy-two million, nine hundred nineteen thousand, four hundred thirty-two".