221341331 has 4 divisors (see below), whose sum is σ = 224143200. Its totient is φ = 218539464.

The previous prime is 221341319. The next prime is 221341361. The reversal of 221341331 is 133143122.

221341331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221341331 - 2²² = 217147027 is a prime.

It is a super-2 number, since 2×221341331² = 97983969617703122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221341301) 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, 1400816 + ... + 1400973.

It is an arithmetic number, because the mean of its divisors is an integer number (56035800).

Almost surely, 2^221341331 is an apocalyptic number.

221341331 is a deficient number, since it is larger than the sum of its proper divisors (2801869).

221341331 is an equidigital number, since it uses as much as digits as its factorization.

221341331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801868.

The product of its digits is 432, while the sum is 20.

The square root of 221341331 is about 14877.5445218625. The cubic root of 221341331 is about 604.9054616299.

Adding to 221341331 its reverse (133143122), we get a palindrome (354484453).

The spelling of 221341331 in words is "two hundred twenty-one million, three hundred forty-one thousand, three hundred thirty-one".