56111601 has 16 divisors (see below), whose sum is σ = 92081024. Its totient is φ = 29597184.

The previous prime is 56111593. The next prime is 56111633. The reversal of 56111601 is 10611165.

56111601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56111601 - 2³ = 56111593 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (56111401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102496 + ... + 103041.

It is an arithmetic number, because the mean of its divisors is an integer number (5755064).

Almost surely, 2^56111601 is an apocalyptic number.

It is an amenable number.

56111601 is a deficient number, since it is larger than the sum of its proper divisors (35969423).

56111601 is a wasteful number, since it uses less digits than its factorization.

56111601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205560.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 56111601 is about 7490.7677176642. The cubic root of 56111601 is about 382.8402167609.

Adding to 56111601 its reverse (10611165), we get a palindrome (66722766).

The spelling of 56111601 in words is "fifty-six million, one hundred eleven thousand, six hundred one".