55584561 has 16 divisors (see below), whose sum is σ = 78543360. Its totient is φ = 34903680.

The previous prime is 55584559. The next prime is 55584563. The reversal of 55584561 is 16548555.

It is an interprime number because it is at equal distance from previous prime (55584559) and next prime (55584563).

It is not a de Polignac number, because 55584561 - 2¹ = 55584559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55584563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4225 + ... + 11358.

It is an arithmetic number, because the mean of its divisors is an integer number (4908960).

Almost surely, 2^55584561 is an apocalyptic number.

It is an amenable number.

55584561 is a deficient number, since it is larger than the sum of its proper divisors (22958799).

55584561 is a wasteful number, since it uses less digits than its factorization.

55584561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15656.

The product of its digits is 120000, while the sum is 39.

The square root of 55584561 is about 7455.5054154631. The cubic root of 55584561 is about 381.6378085217.

The spelling of 55584561 in words is "fifty-five million, five hundred eighty-four thousand, five hundred sixty-one".