56111805 has 16 divisors (see below), whose sum is σ = 99754560. Its totient is φ = 29926224.

The previous prime is 56111801. The next prime is 56111813. The reversal of 56111805 is 50811165.

It is not a de Polignac number, because 56111805 - 2² = 56111801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56111801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207687 + ... + 207956.

It is an arithmetic number, because the mean of its divisors is an integer number (6234660).

Almost surely, 2^56111805 is an apocalyptic number.

It is an amenable number.

56111805 is a deficient number, since it is larger than the sum of its proper divisors (43642755).

56111805 is a wasteful number, since it uses less digits than its factorization.

56111805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415657 (or 415651 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 56111805 is about 7490.7813344137. The cubic root of 56111805 is about 382.8406807132.

The spelling of 56111805 in words is "fifty-six million, one hundred eleven thousand, eight hundred five".