2221331 has 4 divisors (see below), whose sum is σ = 2538672. Its totient is φ = 1903992.

The previous prime is 2221321. The next prime is 2221333. The reversal of 2221331 is 1331222.

It is a happy number.

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 2221331 - 2¹⁰ = 2220307 is a prime.

It is a super-2 number, since 2×2221331² = 9868622823122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221333) 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, 158660 + ... + 158673.

It is an arithmetic number, because the mean of its divisors is an integer number (634668).

2^2221331 is an apocalyptic number.

2221331 is a deficient number, since it is larger than the sum of its proper divisors (317341).

2221331 is an equidigital number, since it uses as much as digits as its factorization.

2221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317340.

The product of its digits is 72, while the sum is 14.

The square root of 2221331 is about 1490.4130300021. The cubic root of 2221331 is about 130.4781406211.

Adding to 2221331 its reverse (1331222), we get a palindrome (3552553).

It can be divided in two parts, 2221 and 331, that added together give a palindrome (2552).

The spelling of 2221331 in words is "two million, two hundred twenty-one thousand, three hundred thirty-one".