1355221443 has 8 divisors (see below), whose sum is σ = 1807453008. Its totient is φ = 903235424.

The previous prime is 1355221393. The next prime is 1355221457. The reversal of 1355221443 is 3441225531.

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 1355221443 - 2²⁹ = 818350531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1355221443.

It is not an unprimeable number, because it can be changed into a prime (1355221463) 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 7 ways as a sum of consecutive naturals, for example, 48096 + ... + 70877.

It is an arithmetic number, because the mean of its divisors is an integer number (225931626).

Almost surely, 2^1355221443 is an apocalyptic number.

1355221443 is a deficient number, since it is larger than the sum of its proper divisors (452231565).

1355221443 is a wasteful number, since it uses less digits than its factorization.

1355221443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122773.

The product of its digits is 14400, while the sum is 30.

The square root of 1355221443 is about 36813.3324082458. The cubic root of 1355221443 is about 1106.6325024634.

Adding to 1355221443 its reverse (3441225531), we get a palindrome (4796446974).

The spelling of 1355221443 in words is "one billion, three hundred fifty-five million, two hundred twenty-one thousand, four hundred forty-three".