4243311321 has 4 divisors (see below), whose sum is σ = 5657748432. Its totient is φ = 2828874212.

The previous prime is 4243311311. The next prime is 4243311389. The reversal of 4243311321 is 1231133424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4243311321 - 2⁶ = 4243311257 is a prime.

It is a super-3 number, since 3×4243311321³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4243311291 and 4243311300.

It is not an unprimeable number, because it can be changed into a prime (4243311301) 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, 707218551 + ... + 707218556.

It is an arithmetic number, because the mean of its divisors is an integer number (1414437108).

Almost surely, 2^4243311321 is an apocalyptic number.

It is an amenable number.

4243311321 is a deficient number, since it is larger than the sum of its proper divisors (1414437111).

4243311321 is a wasteful number, since it uses less digits than its factorization.

4243311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414437110.

The product of its digits is 1728, while the sum is 24.

The square root of 4243311321 is about 65140.7040259775. The cubic root of 4243311321 is about 1618.9557006060.

Adding to 4243311321 its reverse (1231133424), we get a palindrome (5474444745).

The spelling of 4243311321 in words is "four billion, two hundred forty-three million, three hundred eleven thousand, three hundred twenty-one".