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530 = 2553
BaseRepresentation
bin1000010010
3201122
420102
54110
62242
71355
oct1022
9648
10530
11442
12382
1331a
1429c
15255
hex212

530 has 8 divisors (see below), whose sum is σ = 972. Its totient is φ = 208.

The previous prime is 523. The next prime is 541. The reversal of 530 is 35.

530 is nontrivially palindromic in base 4 and base 16.

It is a Cunningham number, because it is equal to 232+1.

530 is an esthetic number in base 16, because in such base it adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 529 + 1 = 23^2 + 1^2 .

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

530 is an undulating number in base 16.

It is a Curzon number.

It is a plaindrome in base 7, base 14 and base 15.

It is a nialpdrome in base 5, base 10 and base 11.

It is an unprimeable number.

530 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 (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 36.

530 is a deficient number, since it is larger than the sum of its proper divisors (442).

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

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

The sum of its prime factors is 60.

The product of its (nonzero) digits is 15, while the sum is 8.

The square root of 530 is about 23.0217288664. The cubic root of 530 is about 8.0926723346.

The spelling of 530 in words is "five hundred thirty", and is thus an aban number and an oban number.

Divisors: 1 2 5 10 53 106 265 530