221105365255 has 16 divisors (see below), whose sum is σ = 266860197504. Its totient is φ = 175864550400.

The previous prime is 221105365219. The next prime is 221105365307. The reversal of 221105365255 is 552563501122.

It is not a de Polignac number, because 221105365255 - 2⁹ = 221105364743 is a prime.

It is a super-2 number, since 2×221105365255² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 468855 + ... + 813655.

It is an arithmetic number, because the mean of its divisors is an integer number (16678762344).

Almost surely, 2^221105365255 is an apocalyptic number.

221105365255 is a deficient number, since it is larger than the sum of its proper divisors (45754832249).

221105365255 is a wasteful number, since it uses less digits than its factorization.

221105365255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345546.

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 221105365255 its reverse (552563501122), we get a palindrome (773668866377).

The spelling of 221105365255 in words is "two hundred twenty-one billion, one hundred five million, three hundred sixty-five thousand, two hundred fifty-five".