56005511 has 8 divisors (see below), whose sum is σ = 56641104. Its totient is φ = 55373760.

The previous prime is 56005493. The next prime is 56005541. The reversal of 56005511 is 11550065.

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

It is a cyclic number.

It is not a de Polignac number, because 56005511 - 2¹⁸ = 55743367 is a prime.

It is a super-2 number, since 2×56005511² = 6273234524742242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56005541) 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, 35816 + ... + 37346.

It is an arithmetic number, because the mean of its divisors is an integer number (7080138).

Almost surely, 2^56005511 is an apocalyptic number.

56005511 is a deficient number, since it is larger than the sum of its proper divisors (635593).

56005511 is a wasteful number, since it uses less digits than its factorization.

56005511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 56005511 is about 7483.6829836652. The cubic root of 56005511 is about 382.5987863377.

Adding to 56005511 its reverse (11550065), we get a palindrome (67555576).

It can be divided in two parts, 5600 and 5511, that added together give a palindrome (11111).

The spelling of 56005511 in words is "fifty-six million, five thousand, five hundred eleven".