221396343 has 16 divisors (see below), whose sum is σ = 340709376. Its totient is φ = 125258400.

The previous prime is 221396339. The next prime is 221396347. The reversal of 221396343 is 343693122.

It is an interprime number because it is at equal distance from previous prime (221396339) and next prime (221396347).

It is not a de Polignac number, because 221396343 - 2² = 221396339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221396347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50071 + ... + 54312.

It is an arithmetic number, because the mean of its divisors is an integer number (21294336).

Almost surely, 2^221396343 is an apocalyptic number.

221396343 is a deficient number, since it is larger than the sum of its proper divisors (119313033).

221396343 is a wasteful number, since it uses less digits than its factorization.

221396343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104494.

The product of its digits is 23328, while the sum is 33.

The square root of 221396343 is about 14879.3932335966. The cubic root of 221396343 is about 604.9555717210.

It can be divided in two parts, 22139 and 6343, that added together give a palindrome (28482).

The spelling of 221396343 in words is "two hundred twenty-one million, three hundred ninety-six thousand, three hundred forty-three".