15481 has 4 divisors (see below), whose sum is σ = 15732. Its totient is φ = 15232.

The previous prime is 15473. The next prime is 15493. The reversal of 15481 is 18451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3600 + 11881 = 60^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 15481 - 2³ = 15473 is a prime.

It is a super-2 number, since 2×15481² = 479322722, which contains 22 as substring.

It is a Duffinian number.

15481 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45 + ... + 181.

It is an arithmetic number, because the mean of its divisors is an integer number (3933).

2¹⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

15481 is a deficient number, since it is larger than the sum of its proper divisors (251).

15481 is a wasteful number, since it uses less digits than its factorization.

15481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its digits is 160, while the sum is 19.

The square root of 15481 is about 124.4226667453. The cubic root of 15481 is about 24.9229628550.

It can be divided in two parts, 15 and 481, that added together give a triangular number (496 = T₃₁).

The spelling of 15481 in words is "fifteen thousand, four hundred eighty-one".