2111056556 has 12 divisors (see below), whose sum is σ = 4222113168. Its totient is φ = 904738512.

The previous prime is 2111056543. The next prime is 2111056567. The reversal of 2111056556 is 6556501112.

2111056556 is an admirable number.

It is a super-2 number, since 2×2111056556² = 8913119565261162272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37697411 + ... + 37697466.

It is an arithmetic number, because the mean of its divisors is an integer number (351842764).

Almost surely, 2^2111056556 is an apocalyptic number.

It is an amenable number.

2111056556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2111056556 is a wasteful number, since it uses less digits than its factorization.

2111056556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75394888 (or 75394886 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 32.

The square root of 2111056556 is about 45946.2354932371. The cubic root of 2111056556 is about 1282.8226600458.

Adding to 2111056556 its reverse (6556501112), we get a palindrome (8667557668).

The spelling of 2111056556 in words is "two billion, one hundred eleven million, fifty-six thousand, five hundred fifty-six".