221142016 has 22 divisors (see below), whose sum is σ = 442070120. Its totient is φ = 110570496.

The previous prime is 221142013. The next prime is 221142029. The reversal of 221142016 is 610241122.

It is a junction number, because it is equal to n+sod(n) for n = 221141984 and 221142002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221142011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106956 + ... + 109003.

Almost surely, 2^221142016 is an apocalyptic number.

It is an amenable number.

221142016 is a deficient number, since it is larger than the sum of its proper divisors (220928104).

221142016 is an equidigital number, since it uses as much as digits as its factorization.

221142016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215979 (or 215961 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 221142016 is about 14870.8444951859. The cubic root of 221142016 is about 604.7238372593.

Adding to 221142016 its reverse (610241122), we get a palindrome (831383138).

The spelling of 221142016 in words is "two hundred twenty-one million, one hundred forty-two thousand, sixteen".