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55242 = 2341131
BaseRepresentation
bin1101011111001010
32210210000
431133022
53231432
61103430
7320025
oct153712
983700
1055242
1138560
1227b76
131c1b5
14161bc
151157c
hexd7ca

55242 has 40 divisors (see below), whose sum is σ = 139392. Its totient is φ = 16200.

The previous prime is 55229. The next prime is 55243. The reversal of 55242 is 24255.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (55243) by changing a digit.

55242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1767 + ... + 1797.

255242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69696).

55242 is an abundant number, since it is smaller than the sum of its proper divisors (84150).

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

55242 is a wasteful number, since it uses less digits than its factorization.

55242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 47 counting only the distinct ones).

The product of its digits is 400, while the sum is 18.

The square root of 55242 is about 235.0361674296. The cubic root of 55242 is about 38.0852196374.

Adding to 55242 its reverse (24255), we get a palindrome (79497).

The spelling of 55242 in words is "fifty-five thousand, two hundred forty-two".

Divisors: 1 2 3 6 9 11 18 22 27 31 33 54 62 66 81 93 99 162 186 198 279 297 341 558 594 682 837 891 1023 1674 1782 2046 2511 3069 5022 6138 9207 18414 27621 55242