2220621320 has 16 divisors (see below), whose sum is σ = 4996398060. Its totient is φ = 888248512.

The previous prime is 2220621317. The next prime is 2220621343. The reversal of 2220621320 is 231260222.

It can be written as a sum of positive squares in 2 ways, for example, as 2200172836 + 20448484 = 46906^2 + 4522^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2220621292 and 2220621301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27757727 + ... + 27757806.

Almost surely, 2^2220621320 is an apocalyptic number.

2220621320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2220621320 is an abundant number, since it is smaller than the sum of its proper divisors (2775776740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2220621320 is a wasteful number, since it uses less digits than its factorization.

2220621320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55515544 (or 55515540 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2220621320 is about 47123.4688875936. The cubic root of 2220621320 is about 1304.6424390939.

Adding to 2220621320 its reverse (231260222), we get a palindrome (2451881542).

The spelling of 2220621320 in words is "two billion, two hundred twenty million, six hundred twenty-one thousand, three hundred twenty".