55518543 has 12 divisors (see below), whose sum is σ = 80615808. Its totient is φ = 36817440.

The previous prime is 55518539. The next prime is 55518559. The reversal of 55518543 is 34581555.

It is a happy number.

It is not a de Polignac number, because 55518543 - 2² = 55518539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55518498 and 55518507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55518523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14430 + ... + 17867.

It is an arithmetic number, because the mean of its divisors is an integer number (6717984).

Almost surely, 2^55518543 is an apocalyptic number.

55518543 is a deficient number, since it is larger than the sum of its proper divisors (25097265).

55518543 is a wasteful number, since it uses less digits than its factorization.

55518543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32494 (or 32491 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 55518543 is about 7451.0766336148. The cubic root of 55518543 is about 381.4866577603.

The spelling of 55518543 in words is "fifty-five million, five hundred eighteen thousand, five hundred forty-three".