221424233155 has 16 divisors (see below), whose sum is σ = 266690852064. Its totient is φ = 176485075200.

The previous prime is 221424233143. The next prime is 221424233183. The reversal of 221424233155 is 551332424122.

221424233155 is digitally balanced in base 11, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221424233155 - 2⁵ = 221424233123 is a prime.

It is a Duffinian number.

221424233155 is strictly pandigital in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 221424233155.

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, 15921705 + ... + 15935605.

It is an arithmetic number, because the mean of its divisors is an integer number (16668178254).

Almost surely, 2^221424233155 is an apocalyptic number.

221424233155 is a deficient number, since it is larger than the sum of its proper divisors (45266618909).

221424233155 is a wasteful number, since it uses less digits than its factorization.

221424233155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25446.

The product of its digits is 57600, while the sum is 34.

Adding to 221424233155 its reverse (551332424122), we get a palindrome (772756657277).

The spelling of 221424233155 in words is "two hundred twenty-one billion, four hundred twenty-four million, two hundred thirty-three thousand, one hundred fifty-five".