55542 has 8 divisors (see below), whose sum is σ = 111096. Its totient is φ = 18512.

The previous prime is 55541. The next prime is 55547. The reversal of 55542 is 24555.

It is a sphenic number, since it is the product of 3 distinct primes.

55542 is an admirable number.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55541) 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, 4623 + ... + 4634.

It is an arithmetic number, because the mean of its divisors is an integer number (13887).

2⁵⁵⁵⁴² is an apocalyptic number.

55542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55548).

55542 is a wasteful number, since it uses less digits than its factorization.

55542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9262.

The product of its digits is 1000, while the sum is 21.

The square root of 55542 is about 235.6735029654. The cubic root of 55542 is about 38.1540377185.

The spelling of 55542 in words is "fifty-five thousand, five hundred forty-two".