2201556 has 24 divisors (see below), whose sum is σ = 5871040. Its totient is φ = 628992.

The previous prime is 2201543. The next prime is 2201581. The reversal of 2201556 is 6551022.

2201556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2201556² = 9693697642272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13021 + ... + 13188.

2^2201556 is an apocalyptic number.

It is an amenable number.

2201556 is an abundant number, since it is smaller than the sum of its proper divisors (3669484).

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

2201556 is a wasteful number, since it uses less digits than its factorization.

2201556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26223 (or 26221 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2201556 is about 1483.7641321989. The cubic root of 2201556 is about 130.0897998877.

Adding to 2201556 its reverse (6551022), we get a palindrome (8752578).

The spelling of 2201556 in words is "two million, two hundred one thousand, five hundred fifty-six".