2201620 has 48 divisors (see below), whose sum is σ = 4935168. Its totient is φ = 823680.

The previous prime is 2201603. The next prime is 2201623. The reversal of 2201620 is 261022.

2201620 = T₈₅ + T₈₆ + ... + T₂₃₉.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2201620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32827 + ... + 32893.

It is an arithmetic number, because the mean of its divisors is an integer number (102816).

2^2201620 is an apocalyptic number.

2201620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2201620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2467584).

2201620 is an abundant number, since it is smaller than the sum of its proper divisors (2733548).

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

2201620 is a wasteful number, since it uses less digits than its factorization.

2201620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2201620 is about 1483.7856988123. The cubic root of 2201620 is about 130.0910604608.

Adding to 2201620 its reverse (261022), we get a palindrome (2462642).

The spelling of 2201620 in words is "two million, two hundred one thousand, six hundred twenty".