221322142 has 16 divisors (see below), whose sum is σ = 346064400. Its totient is φ = 106025920.

The previous prime is 221322137. The next prime is 221322151. The reversal of 221322142 is 241223122.

221322142 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6967 + ... + 22162.

It is an arithmetic number, because the mean of its divisors is an integer number (21629025).

Almost surely, 2^221322142 is an apocalyptic number.

221322142 is a deficient number, since it is larger than the sum of its proper divisors (124742258).

221322142 is a wasteful number, since it uses less digits than its factorization.

221322142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29291.

The product of its digits is 384, while the sum is 19.

The square root of 221322142 is about 14876.8996097977. The cubic root of 221322142 is about 604.8879805351.

Adding to 221322142 its reverse (241223122), we get a palindrome (462545264).

The spelling of 221322142 in words is "two hundred twenty-one million, three hundred twenty-two thousand, one hundred forty-two".