55138 has 8 divisors (see below), whose sum is σ = 87120. Its totient is φ = 26100.

The previous prime is 55127. The next prime is 55147. The reversal of 55138 is 83155.

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

It is a plaindrome in base 12.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688 + ... + 763.

It is an arithmetic number, because the mean of its divisors is an integer number (10890).

2⁵⁵¹³⁸ is an apocalyptic number.

55138 is a deficient number, since it is larger than the sum of its proper divisors (31982).

55138 is a wasteful number, since it uses less digits than its factorization.

55138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472.

The product of its digits is 600, while the sum is 22.

The square root of 55138 is about 234.8148206566. The cubic root of 55138 is about 38.0613045543.

The spelling of 55138 in words is "fifty-five thousand, one hundred thirty-eight".