55851817 has 12 divisors (see below), whose sum is σ = 68793300. Its totient is φ = 45056256.

The previous prime is 55851793. The next prime is 55851821. The reversal of 55851817 is 71815855.

55851817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32387481 + 23464336 = 5691^2 + 4844^2 .

It is not a de Polignac number, because 55851817 - 2⁷ = 55851689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55851817.

It is not an unprimeable number, because it can be changed into a prime (55851827) 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 11 ways as a sum of consecutive naturals, for example, 32692 + ... + 34357.

It is an arithmetic number, because the mean of its divisors is an integer number (5732775).

Almost surely, 2^55851817 is an apocalyptic number.

It is an amenable number.

55851817 is a deficient number, since it is larger than the sum of its proper divisors (12941483).

55851817 is a wasteful number, since it uses less digits than its factorization.

55851817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67080 (or 67073 counting only the distinct ones).

The product of its digits is 56000, while the sum is 40.

The square root of 55851817 is about 7473.4073219650. The cubic root of 55851817 is about 382.2484814633.

The spelling of 55851817 in words is "fifty-five million, eight hundred fifty-one thousand, eight hundred seventeen".