55318641 has 16 divisors (see below), whose sum is σ = 84480000. Its totient is φ = 31541328.

The previous prime is 55318639. The next prime is 55318661. The reversal of 55318641 is 14681355.

It is not a de Polignac number, because 55318641 - 2¹ = 55318639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55318661) 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, 7840 + ... + 13118.

It is an arithmetic number, because the mean of its divisors is an integer number (5280000).

Almost surely, 2^55318641 is an apocalyptic number.

It is an amenable number.

55318641 is a deficient number, since it is larger than the sum of its proper divisors (29161359).

55318641 is a wasteful number, since it uses less digits than its factorization.

55318641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788.

The product of its digits is 14400, while the sum is 33.

The square root of 55318641 is about 7437.6502337768. The cubic root of 55318641 is about 381.0282424074.

Adding to 55318641 its reverse (14681355), we get a palindrome (69999996).

The spelling of 55318641 in words is "fifty-five million, three hundred eighteen thousand, six hundred forty-one".