221245343 has 4 divisors (see below), whose sum is σ = 241358568. Its totient is φ = 201132120.

The previous prime is 221245333. The next prime is 221245391. The reversal of 221245343 is 343542122.

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 221245343 - 2¹⁸ = 220983199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221245333) 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, 10056596 + ... + 10056617.

It is an arithmetic number, because the mean of its divisors is an integer number (60339642).

Almost surely, 2^221245343 is an apocalyptic number.

221245343 is a deficient number, since it is larger than the sum of its proper divisors (20113225).

221245343 is a wasteful number, since it uses less digits than its factorization.

221245343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20113224.

The product of its digits is 5760, while the sum is 26.

The square root of 221245343 is about 14874.3182364773. The cubic root of 221245343 is about 604.8180068670.

Adding to 221245343 its reverse (343542122), we get a palindrome (564787465).

The spelling of 221245343 in words is "two hundred twenty-one million, two hundred forty-five thousand, three hundred forty-three".