2111056557 has 8 divisors (see below), whose sum is σ = 2833383360. Its totient is φ = 1398050400.

The previous prime is 2111056543. The next prime is 2111056567. The reversal of 2111056557 is 7556501112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2111056557 - 2⁷ = 2111056429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111056517) 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, 2329632 + ... + 2330537.

It is an arithmetic number, because the mean of its divisors is an integer number (354172920).

Almost surely, 2^2111056557 is an apocalyptic number.

It is an amenable number.

2111056557 is a deficient number, since it is larger than the sum of its proper divisors (722326803).

2111056557 is a wasteful number, since it uses less digits than its factorization.

2111056557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660323.

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 2111056557 is about 45946.2355041194. The cubic root of 2111056557 is about 1282.8226602484.

Adding to 2111056557 its reverse (7556501112), we get a palindrome (9667557669).

The spelling of 2111056557 in words is "two billion, one hundred eleven million, fifty-six thousand, five hundred fifty-seven".