2311323221 has 8 divisors (see below), whose sum is σ = 2321283360. Its totient is φ = 2301383952.

The previous prime is 2311323197. The next prime is 2311323233. The reversal of 2311323221 is 1223231132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311323221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311323193 and 2311323202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311323251) 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, 241106 + ... + 250508.

It is an arithmetic number, because the mean of its divisors is an integer number (290160420).

Almost surely, 2^2311323221 is an apocalyptic number.

It is an amenable number.

2311323221 is a deficient number, since it is larger than the sum of its proper divisors (9960139).

2311323221 is an equidigital number, since it uses as much as digits as its factorization.

2311323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10435.

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

The square root of 2311323221 is about 48076.2230317649. The cubic root of 2311323221 is about 1322.1687681207.

Adding to 2311323221 its reverse (1223231132), we get a palindrome (3534554353).

The spelling of 2311323221 in words is "two billion, three hundred eleven million, three hundred twenty-three thousand, two hundred twenty-one".