221122255 has 8 divisors (see below), whose sum is σ = 269697024. Its totient is φ = 173997600.

The previous prime is 221122193. The next prime is 221122259. The reversal of 221122255 is 552221122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221122255 - 2⁷ = 221122127 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 362191 + ... + 362800.

It is an arithmetic number, because the mean of its divisors is an integer number (33712128).

Almost surely, 2^221122255 is an apocalyptic number.

221122255 is a deficient number, since it is larger than the sum of its proper divisors (48574769).

221122255 is an equidigital number, since it uses as much as digits as its factorization.

221122255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725057.

The product of its digits is 800, while the sum is 22.

The square root of 221122255 is about 14870.1800594344. The cubic root of 221122255 is about 604.7058242438.

Adding to 221122255 its reverse (552221122), we get a palindrome (773343377).

The spelling of 221122255 in words is "two hundred twenty-one million, one hundred twenty-two thousand, two hundred fifty-five".