2313322221 has 16 divisors (see below), whose sum is σ = 3678326784. Its totient is φ = 1264424304.

The previous prime is 2313322211. The next prime is 2313322223. The reversal of 2313322221 is 1222233132.

It is a happy number.

It is not a de Polignac number, because 2313322221 - 2⁹ = 2313321709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313322223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2394261 + ... + 2395226.

It is an arithmetic number, because the mean of its divisors is an integer number (229895424).

Almost surely, 2^2313322221 is an apocalyptic number.

2313322221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2313322221 is a deficient number, since it is larger than the sum of its proper divisors (1365004563).

2313322221 is a wasteful number, since it uses less digits than its factorization.

2313322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4789520.

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

The square root of 2313322221 is about 48097.0084412742. The cubic root of 2313322221 is about 1322.5498274424.

Adding to 2313322221 its reverse (1222233132), we get a palindrome (3535555353).

It can be divided in two parts, 23133 and 22221, that added together give a palindrome (45354).

The spelling of 2313322221 in words is "two billion, three hundred thirteen million, three hundred twenty-two thousand, two hundred twenty-one".