221452535554 has 32 divisors (see below), whose sum is σ = 342582670080. Its totient is φ = 107316762000.

The previous prime is 221452535543. The next prime is 221452535617. The reversal of 221452535554 is 455535254122.

It is a self number, because there is not a number n which added to its sum of digits gives 221452535554.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4785829 + ... + 4831879.

It is an arithmetic number, because the mean of its divisors is an integer number (10705708440).

Almost surely, 2^221452535554 is an apocalyptic number.

221452535554 is a deficient number, since it is larger than the sum of its proper divisors (121130134526).

221452535554 is a wasteful number, since it uses less digits than its factorization.

221452535554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46686.

The product of its digits is 1200000, while the sum is 43.

Adding to 221452535554 its reverse (455535254122), we get a palindrome (676987789676).

The spelling of 221452535554 in words is "two hundred twenty-one billion, four hundred fifty-two million, five hundred thirty-five thousand, five hundred fifty-four".