221135343 has 32 divisors (see below), whose sum is σ = 347424000. Its totient is φ = 123344640.

The previous prime is 221135339. The next prime is 221135381. The reversal of 221135343 is 343531122.

It is not a de Polignac number, because 221135343 - 2² = 221135339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213555 + ... + 214587.

It is an arithmetic number, because the mean of its divisors is an integer number (10857000).

Almost surely, 2^221135343 is an apocalyptic number.

221135343 is a deficient number, since it is larger than the sum of its proper divisors (126288657).

221135343 is a wasteful number, since it uses less digits than its factorization.

221135343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559.

The product of its digits is 2160, while the sum is 24.

The square root of 221135343 is about 14870.6201282932. The cubic root of 221135343 is about 604.7177546481.

Adding to 221135343 its reverse (343531122), we get a palindrome (564666465).

The spelling of 221135343 in words is "two hundred twenty-one million, one hundred thirty-five thousand, three hundred forty-three".