1355221343 has 4 divisors (see below), whose sum is σ = 1548824400. Its totient is φ = 1161618288.

The previous prime is 1355221321. The next prime is 1355221349. The reversal of 1355221343 is 3431225531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1355221343 - 2⁶ = 1355221279 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 (1355221349) 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, 96801518 + ... + 96801531.

It is an arithmetic number, because the mean of its divisors is an integer number (387206100).

Almost surely, 2^1355221343 is an apocalyptic number.

1355221343 is a deficient number, since it is larger than the sum of its proper divisors (193603057).

1355221343 is an equidigital number, since it uses as much as digits as its factorization.

1355221343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193603056.

The product of its digits is 10800, while the sum is 29.

The square root of 1355221343 is about 36813.3310500422. The cubic root of 1355221343 is about 1106.6324752444.

Adding to 1355221343 its reverse (3431225531), we get a palindrome (4786446874).

The spelling of 1355221343 in words is "one billion, three hundred fifty-five million, two hundred twenty-one thousand, three hundred forty-three".