56557111 has 8 divisors (see below), whose sum is σ = 61536944. Its totient is φ = 51667200.

The previous prime is 56557093. The next prime is 56557117. The reversal of 56557111 is 11175565.

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

It is not a de Polignac number, because 56557111 - 2¹¹ = 56555063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56557117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21165 + ... + 23686.

It is an arithmetic number, because the mean of its divisors is an integer number (7692118).

Almost surely, 2^56557111 is an apocalyptic number.

56557111 is a deficient number, since it is larger than the sum of its proper divisors (4979833).

56557111 is a wasteful number, since it uses less digits than its factorization.

56557111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44961.

The product of its digits is 5250, while the sum is 31.

The square root of 56557111 is about 7520.4461968689. The cubic root of 56557111 is about 383.8507607819.

The spelling of 56557111 in words is "fifty-six million, five hundred fifty-seven thousand, one hundred eleven".