2231332221 has 8 divisors (see below), whose sum is σ = 3044298400. Its totient is φ = 1452960432.

The previous prime is 2231332219. The next prime is 2231332223. The reversal of 2231332221 is 1222331322.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2231332219) and next prime (2231332223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2231332221 - 2¹ = 2231332219 is a prime.

It is a super-3 number, since 3×2231332221³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231332223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8648446 + ... + 8648703.

It is an arithmetic number, because the mean of its divisors is an integer number (380537300).

Almost surely, 2^2231332221 is an apocalyptic number.

It is an amenable number.

2231332221 is a deficient number, since it is larger than the sum of its proper divisors (812966179).

2231332221 is a wasteful number, since it uses less digits than its factorization.

2231332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17297195.

The product of its digits is 864, while the sum is 21.

The square root of 2231332221 is about 47236.9793805658. The cubic root of 2231332221 is about 1306.7366711231.

Adding to 2231332221 its reverse (1222331322), we get a palindrome (3453663543).

The spelling of 2231332221 in words is "two billion, two hundred thirty-one million, three hundred thirty-two thousand, two hundred twenty-one".