1343430221 has 4 divisors (see below), whose sum is σ = 1535348832. Its totient is φ = 1151511612.

The previous prime is 1343430217. The next prime is 1343430247. The reversal of 1343430221 is 1220343431.

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 an emirpimes, since its reverse is a distinct semiprime: 1220343431 = 821 ⋅1486411.

It is a cyclic number.

It is not a de Polignac number, because 1343430221 - 2² = 1343430217 is a prime.

It is a super-2 number, since 2×1343430221² = 3609609517392217682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1343430211) 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, 95959295 + ... + 95959308.

It is an arithmetic number, because the mean of its divisors is an integer number (383837208).

Almost surely, 2^1343430221 is an apocalyptic number.

It is an amenable number.

1343430221 is a deficient number, since it is larger than the sum of its proper divisors (191918611).

1343430221 is an equidigital number, since it uses as much as digits as its factorization.

1343430221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191918610.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1343430221 is about 36652.8337376525. The cubic root of 1343430221 is about 1103.4136984043.

Adding to 1343430221 its reverse (1220343431), we get a palindrome (2563773652).

The spelling of 1343430221 in words is "one billion, three hundred forty-three million, four hundred thirty thousand, two hundred twenty-one".