3440340221 has 8 divisors (see below), whose sum is σ = 3460537080. Its totient is φ = 3420168192.

The previous prime is 3440340199. The next prime is 3440340229. The reversal of 3440340221 is 1220430443.

It can be written as a sum of positive squares in 4 ways, for example, as 435765625 + 3004574596 = 20875^2 + 54814^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3440340221 - 2¹⁰ = 3440339197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440340229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321485 + ... + 332013.

It is an arithmetic number, because the mean of its divisors is an integer number (432567135).

Almost surely, 2^3440340221 is an apocalyptic number.

It is an amenable number.

3440340221 is a deficient number, since it is larger than the sum of its proper divisors (20196859).

3440340221 is a wasteful number, since it uses less digits than its factorization.

3440340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12415.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 3440340221 is about 58654.4134827039. The cubic root of 3440340221 is about 1509.6182273887.

Adding to 3440340221 its reverse (1220430443), we get a palindrome (4660770664).

The spelling of 3440340221 in words is "three billion, four hundred forty million, three hundred forty thousand, two hundred twenty-one".