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55158 = 2329317

55158 has 16 divisors (see below), whose sum is σ = 114480. Its totient is φ = 17696.

The previous prime is 55147. The next prime is 55163. The reversal of 55158 is 85155.

It is a nialpdrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55158.

It is an unprimeable number.

55158 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 16 + ... + 332.

It is an arithmetic number, because the mean of its divisors is an integer number (7155).

255158 is an apocalyptic number.

55158 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55158 is an abundant number, since it is smaller than the sum of its proper divisors (59322).

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 (57240).

55158 is a wasteful number, since it uses less digits than its factorization.

55158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351.

The product of its digits is 1000, while the sum is 24.

The square root of 55158 is about 234.8574035452. The cubic root of 55158 is about 38.0659059428.

The spelling of 55158 in words is "fifty-five thousand, one hundred fifty-eight".

Divisors: 1 2 3 6 29 58 87 174 317 634 951 1902 9193 18386 27579 55158