221131341 has 6 divisors (see below), whose sum is σ = 319411950. Its totient is φ = 147420888.

The previous prime is 221131321. The next prime is 221131343. The reversal of 221131341 is 143131122.

221131341 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 219899241 + 1232100 = 14829^2 + 1110^2 .

It is not a de Polignac number, because 221131341 - 2¹⁸ = 220869197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131343) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12285066 + ... + 12285083.

It is an arithmetic number, because the mean of its divisors is an integer number (53235325).

Almost surely, 2^221131341 is an apocalyptic number.

It is an amenable number.

221131341 is a deficient number, since it is larger than the sum of its proper divisors (98280609).

221131341 is a wasteful number, since it uses less digits than its factorization.

221131341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24570155 (or 24570152 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 221131341 is about 14870.4855670553. The cubic root of 221131341 is about 604.7141066633.

Adding to 221131341 its reverse (143131122), we get a palindrome (364262463).

The spelling of 221131341 in words is "two hundred twenty-one million, one hundred thirty-one thousand, three hundred forty-one".