56111611 has 4 divisors (see below), whose sum is σ = 59412312. Its totient is φ = 52810912.

The previous prime is 56111593. The next prime is 56111633. The reversal of 56111611 is 11611165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56111611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56111711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650325 + ... + 1650358.

It is an arithmetic number, because the mean of its divisors is an integer number (14853078).

Almost surely, 2^56111611 is an apocalyptic number.

56111611 is a deficient number, since it is larger than the sum of its proper divisors (3300701).

56111611 is a wasteful number, since it uses less digits than its factorization.

56111611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300700.

The product of its digits is 180, while the sum is 22.

The square root of 56111611 is about 7490.7683851525. The cubic root of 56111611 is about 382.8402395037.

Adding to 56111611 its reverse (11611165), we get a palindrome (67722776).

The spelling of 56111611 in words is "fifty-six million, one hundred eleven thousand, six hundred eleven".