4312021243 has 2 divisors, whose sum is σ = 4312021244. Its totient is φ = 4312021242.

The previous prime is 4312021237. The next prime is 4312021261. The reversal of 4312021243 is 3421202134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4312021243 - 2¹³ = 4312013051 is a prime.

It is not a weakly prime, because it can be changed into another prime (4312021843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156010621 + 2156010622.

It is an arithmetic number, because the mean of its divisors is an integer number (2156010622).

Almost surely, 2^4312021243 is an apocalyptic number.

4312021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4312021243 is an equidigital number, since it uses as much as digits as its factorization.

4312021243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 4312021243 is about 65665.9823881437. The cubic root of 4312021243 is about 1627.6472817303.

Adding to 4312021243 its reverse (3421202134), we get a palindrome (7733223377).

The spelling of 4312021243 in words is "four billion, three hundred twelve million, twenty-one thousand, two hundred forty-three".