1343424221 has 4 divisors (see below), whose sum is σ = 1343523132. Its totient is φ = 1343325312.

The previous prime is 1343424211. The next prime is 1343424233. The reversal of 1343424221 is 1224243431.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1224243431 = 2543 ⋅481417.

It can be written as a sum of positive squares in 2 ways, for example, as 870840100 + 472584121 = 29510^2 + 21739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343424221 - 2¹⁴ = 1343407837 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 (1343424211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25076 + ... + 57581.

It is an arithmetic number, because the mean of its divisors is an integer number (335880783).

Almost surely, 2^1343424221 is an apocalyptic number.

It is an amenable number.

1343424221 is a deficient number, since it is larger than the sum of its proper divisors (98911).

1343424221 is an equidigital number, since it uses as much as digits as its factorization.

1343424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98910.

The product of its digits is 4608, while the sum is 26.

The square root of 1343424221 is about 36652.7518885008. The cubic root of 1343424221 is about 1103.4120557208.

Adding to 1343424221 its reverse (1224243431), we get a palindrome (2567667652).

The spelling of 1343424221 in words is "one billion, three hundred forty-three million, four hundred twenty-four thousand, two hundred twenty-one".