15530 has 8 divisors (see below), whose sum is σ = 27972. Its totient is φ = 6208.

The previous prime is 15527. The next prime is 15541. The reversal of 15530 is 3551.

It can be written as a sum of positive squares in 2 ways, for example, as 14161 + 1369 = 119^2 + 37^2 .

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

It is a nialpdrome in base 5.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 15530.

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, 767 + ... + 786.

2¹⁵⁵³⁰ is an apocalyptic number.

15530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15530 is a deficient number, since it is larger than the sum of its proper divisors (12442).

15530 is a wasteful number, since it uses less digits than its factorization.

15530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560.

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 15530 is about 124.6194206374. The cubic root of 15530 is about 24.9492303006.

It can be divided in two parts, 15 and 530, that added together give a palindrome (545).

The spelling of 15530 in words is "fifteen thousand, five hundred thirty".