55684217 has 4 divisors (see below), whose sum is σ = 55967076. Its totient is φ = 55401360.

The previous prime is 55684207. The next prime is 55684243. The reversal of 55684217 is 71248655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45373696 + 10310521 = 6736^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 55684217 - 2⁸ = 55683961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55684207) 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, 141134 + ... + 141527.

It is an arithmetic number, because the mean of its divisors is an integer number (13991769).

Almost surely, 2^55684217 is an apocalyptic number.

It is an amenable number.

55684217 is a deficient number, since it is larger than the sum of its proper divisors (282859).

55684217 is a wasteful number, since it uses less digits than its factorization.

55684217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282858.

The product of its digits is 67200, while the sum is 38.

The square root of 55684217 is about 7462.1858057810. The cubic root of 55684217 is about 381.8657482604.

The spelling of 55684217 in words is "fifty-five million, six hundred eighty-four thousand, two hundred seventeen".