56218705 has 4 divisors (see below), whose sum is σ = 67462452. Its totient is φ = 44974960.

The previous prime is 56218703. The next prime is 56218727. The reversal of 56218705 is 50781265.

56218705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50781265 = 5 ⋅10156253.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 43996689 = 3496^2 + 6633^2 .

It is not a de Polignac number, because 56218705 - 2¹ = 56218703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56218703) 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 3 ways as a sum of consecutive naturals, for example, 5621866 + ... + 5621875.

It is an arithmetic number, because the mean of its divisors is an integer number (16865613).

Almost surely, 2^56218705 is an apocalyptic number.

It is an amenable number.

56218705 is a deficient number, since it is larger than the sum of its proper divisors (11243747).

56218705 is a wasteful number, since it uses less digits than its factorization.

56218705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11243746.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 56218705 is about 7497.9133764001. The cubic root of 56218705 is about 383.0836462634.

The spelling of 56218705 in words is "fifty-six million, two hundred eighteen thousand, seven hundred five".