221016722 has 4 divisors (see below), whose sum is σ = 331525086. Its totient is φ = 110508360.

The previous prime is 221016713. The next prime is 221016727. The reversal of 221016722 is 227610122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 212022721 + 8994001 = 14561^2 + 2999^2 .

It is not an unprimeable number, because it can be changed into a prime (221016727) by changing a digit.

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 as a sum of consecutive naturals, namely, 55254179 + ... + 55254182.

Almost surely, 2^221016722 is an apocalyptic number.

221016722 is a deficient number, since it is larger than the sum of its proper divisors (110508364).

221016722 is a wasteful number, since it uses less digits than its factorization.

221016722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110508363.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 221016722 is about 14866.6311584030. The cubic root of 221016722 is about 604.6096081260.

Adding to 221016722 its reverse (227610122), we get a palindrome (448626844).

The spelling of 221016722 in words is "two hundred twenty-one million, sixteen thousand, seven hundred twenty-two".