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548 = 22137
BaseRepresentation
bin1000100100
3202022
420210
54143
62312
71412
oct1044
9668
10548
11459
12398
13332
142b2
15268
hex224

548 has 6 divisors (see below), whose sum is σ = 966. Its totient is φ = 272.

The previous prime is 547. The next prime is 557. The reversal of 548 is 845.

Adding to 548 its sum of digits (17), we get a palindrome (565).

Multipling 548 by its sum of digits (17), we get a triangular number (9316 = T136).

548 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in only one way, i.e., 484 + 64 = 22^2 + 8^2 .

548 is an undulating number in base 14.

It is a plaindrome in base 9, base 11, base 15 and base 16.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65 + ... + 72.

It is an arithmetic number, because the mean of its divisors is an integer number (161).

It is an amenable number.

548 is a deficient number, since it is larger than the sum of its proper divisors (418).

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

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

The sum of its prime factors is 141 (or 139 counting only the distinct ones).

The product of its digits is 160, while the sum is 17.

The square root of 548 is about 23.4093998214. The cubic root of 548 is about 8.1832694769.

The spelling of 548 in words is "five hundred forty-eight", and thus it is an aban number.

Divisors: 1 2 4 137 274 548