220321616 has 20 divisors (see below), whose sum is σ = 427552992. Its totient is φ = 109985376.

The previous prime is 220321609. The next prime is 220321627. The reversal of 220321616 is 616123022.

It is a super-2 number, since 2×220321616² = 97083228953702912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220321591 and 220321600.

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 3 ways as a sum of consecutive naturals, for example, 290 + ... + 20993.

Almost surely, 2^220321616 is an apocalyptic number.

It is an amenable number.

220321616 is a deficient number, since it is larger than the sum of its proper divisors (207231376).

220321616 is a wasteful number, since it uses less digits than its factorization.

220321616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21938 (or 21932 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 220321616 is about 14843.2346878974. The cubic root of 220321616 is about 603.9751024048.

Adding to 220321616 its reverse (616123022), we get a palindrome (836444638).

The spelling of 220321616 in words is "two hundred twenty million, three hundred twenty-one thousand, six hundred sixteen".