2201720 has 32 divisors (see below), whose sum is σ = 5216400. Its totient is φ = 834048.

The previous prime is 2201711. The next prime is 2201723. The reversal of 2201720 is 271022.

It is a junction number, because it is equal to n+sod(n) for n = 2201695 and 2201704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 2208.

2^2201720 is an apocalyptic number.

2201720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201720 is an abundant number, since it is smaller than the sum of its proper divisors (3014680).

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

2201720 is a wasteful number, since it uses less digits than its factorization.

2201720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927 (or 2923 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 2201720 is about 1483.8193960183. The cubic root of 2201720 is about 130.0930300573.

Adding to 2201720 its reverse (271022), we get a palindrome (2472742).

The spelling of 2201720 in words is "two million, two hundred one thousand, seven hundred twenty".