3443240421 has 20 divisors (see below), whose sum is σ = 5214075372. Its totient is φ = 2264044608.

The previous prime is 3443240417. The next prime is 3443240431. The reversal of 3443240421 is 1240423443.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2498600196 + 944640225 = 49986^2 + 30735^2 .

It is not a de Polignac number, because 3443240421 - 2² = 3443240417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3443240431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 285246 + ... + 297071.

Almost surely, 2^3443240421 is an apocalyptic number.

It is an amenable number.

3443240421 is a deficient number, since it is larger than the sum of its proper divisors (1770834951).

3443240421 is an equidigital number, since it uses as much as digits as its factorization.

3443240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582402 (or 582393 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 3443240421 is about 58679.1310518484. The cubic root of 3443240421 is about 1510.0423099704.

Adding to 3443240421 its reverse (1240423443), we get a palindrome (4683663864).

The spelling of 3443240421 in words is "three billion, four hundred forty-three million, two hundred forty thousand, four hundred twenty-one".