3440213221 has 4 divisors (see below), whose sum is σ = 3440342944. Its totient is φ = 3440083500.

The previous prime is 3440213149. The next prime is 3440213233. The reversal of 3440213221 is 1223120443.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3440213221 - 2²¹ = 3438116069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3440213192 and 3440213201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440243221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9105 + ... + 83446.

It is an arithmetic number, because the mean of its divisors is an integer number (860085736).

Almost surely, 2^3440213221 is an apocalyptic number.

It is an amenable number.

3440213221 is a deficient number, since it is larger than the sum of its proper divisors (129723).

3440213221 is an equidigital number, since it uses as much as digits as its factorization.

3440213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129722.

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

The square root of 3440213221 is about 58653.3308602333. The cubic root of 3440213221 is about 1509.5996513311.

Adding to 3440213221 its reverse (1223120443), we get a palindrome (4663333664).

The spelling of 3440213221 in words is "three billion, four hundred forty million, two hundred thirteen thousand, two hundred twenty-one".