2221333331 has 4 divisors (see below), whose sum is σ = 2538666672. Its totient is φ = 1903999992.

The previous prime is 2221333327. The next prime is 2221333393. The reversal of 2221333331 is 1333331222.

2221333331 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 2221333331 - 2² = 2221333327 is a prime.

It is a super-2 number, since 2×2221333331² = 9868643534823111122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221333297 and 2221333306.

It is not an unprimeable number, because it can be changed into a prime (2221333531) 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, 158666660 + ... + 158666673.

It is an arithmetic number, because the mean of its divisors is an integer number (634666668).

Almost surely, 2^2221333331 is an apocalyptic number.

2221333331 is a deficient number, since it is larger than the sum of its proper divisors (317333341).

2221333331 is an equidigital number, since it uses as much as digits as its factorization.

2221333331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317333340.

The product of its digits is 1944, while the sum is 23.

The square root of 2221333331 is about 47131.0230209360. The cubic root of 2221333331 is about 1304.7818626110.

Adding to 2221333331 its reverse (1333331222), we get a palindrome (3554664553).

The spelling of 2221333331 in words is "two billion, two hundred twenty-one million, three hundred thirty-three thousand, three hundred thirty-one".