443031340421 has 2 divisors, whose sum is σ = 443031340422. Its totient is φ = 443031340420.

The previous prime is 443031340387. The next prime is 443031340469. The reversal of 443031340421 is 124043130344.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442339387396 + 691953025 = 665086^2 + 26305^2 .

It is a cyclic number.

It is not a de Polignac number, because 443031340421 - 2¹⁴ = 443031324037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443030340421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221515670210 + 221515670211.

It is an arithmetic number, because the mean of its divisors is an integer number (221515670211).

Almost surely, 2^443031340421 is an apocalyptic number.

It is an amenable number.

443031340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

443031340421 is an equidigital number, since it uses as much as digits as its factorization.

443031340421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 443031340421 its reverse (124043130344), we get a palindrome (567074470765).

The spelling of 443031340421 in words is "four hundred forty-three billion, thirty-one million, three hundred forty thousand, four hundred twenty-one".