2211620 has 12 divisors (see below), whose sum is σ = 4644444. Its totient is φ = 884640.

The previous prime is 2211617. The next prime is 2211623. The reversal of 2211620 is 261122.

2211620 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2211617) and next prime (2211623).

It can be written as a sum of positive squares in 2 ways, for example, as 1532644 + 678976 = 1238^2 + 824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2211595 and 2211604.

It is not an unprimeable number, because it can be changed into a prime (2211623) 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 in 3 ways as a sum of consecutive naturals, for example, 55271 + ... + 55310.

It is an arithmetic number, because the mean of its divisors is an integer number (387037).

2^2211620 is an apocalyptic number.

2211620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211620 is an abundant number, since it is smaller than the sum of its proper divisors (2432824).

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

2211620 is a wasteful number, since it uses less digits than its factorization.

2211620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110590 (or 110588 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2211620 is about 1487.1516398807. The cubic root of 2211620 is about 130.2877256336.

Adding to 2211620 its reverse (261122), we get a palindrome (2472742).

The spelling of 2211620 in words is "two million, two hundred eleven thousand, six hundred twenty".