221535331404227 has 4 divisors (see below), whose sum is σ = 233195085688680. Its totient is φ = 209875577119776.

The previous prime is 221535331404221. The next prime is 221535331404253. The reversal of 221535331404227 is 722404133535122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221535331404227 - 2¹⁰ = 221535331403203 is a prime.

It is a super-3 number, since 3×221535331404227³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221535331404221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5829877142198 + ... + 5829877142235.

It is an arithmetic number, because the mean of its divisors is an integer number (58298771422170).

Almost surely, 2^{221535331404227} is an apocalyptic number.

221535331404227 is a deficient number, since it is larger than the sum of its proper divisors (11659754284453).

221535331404227 is a wasteful number, since it uses less digits than its factorization.

221535331404227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11659754284452.

The product of its (nonzero) digits is 1209600, while the sum is 44.

Adding to 221535331404227 its reverse (722404133535122), we get a palindrome (943939464939349).

The spelling of 221535331404227 in words is "two hundred twenty-one trillion, five hundred thirty-five billion, three hundred thirty-one million, four hundred four thousand, two hundred twenty-seven".