4342311821 has 2 divisors, whose sum is σ = 4342311822. Its totient is φ = 4342311820.

The previous prime is 4342311803. The next prime is 4342311863. The reversal of 4342311821 is 1281132434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4059601225 + 282710596 = 63715^2 + 16814^2 .

It is a cyclic number.

It is not a de Polignac number, because 4342311821 - 2¹⁴ = 4342295437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4342311521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171155910 + 2171155911.

It is an arithmetic number, because the mean of its divisors is an integer number (2171155911).

Almost surely, 2^4342311821 is an apocalyptic number.

It is an amenable number.

4342311821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4342311821 is an equidigital number, since it uses as much as digits as its factorization.

4342311821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 4342311821 is about 65896.2200812763. The cubic root of 4342311821 is about 1631.4496270111.

The spelling of 4342311821 in words is "four billion, three hundred forty-two million, three hundred eleven thousand, eight hundred twenty-one".