221131334 has 16 divisors (see below), whose sum is σ = 339208128. Its totient is φ = 108068352.

The previous prime is 221131321. The next prime is 221131343. The reversal of 221131334 is 433131122.

221131334 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 113432 + ... + 115364.

It is an arithmetic number, because the mean of its divisors is an integer number (21200508).

Almost surely, 2^221131334 is an apocalyptic number.

221131334 is a deficient number, since it is larger than the sum of its proper divisors (118076794).

221131334 is a wasteful number, since it uses less digits than its factorization.

221131334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199.

The product of its digits is 432, while the sum is 20.

The square root of 221131334 is about 14870.4853316897. The cubic root of 221131334 is about 604.7141002825.

Adding to 221131334 its reverse (433131122), we get a palindrome (654262456).

The spelling of 221131334 in words is "two hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-four".