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15223 = 131171

15223 has 4 divisors (see below), whose sum is σ = 16408. Its totient is φ = 14040.

The previous prime is 15217. The next prime is 15227. The reversal of 15223 is 32251.

15223 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2k-15223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1171 = 15223 / (1 + 5 + 2 + 2 + 3).

It is a Duffinian number.

It is a plaindrome in base 8 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573 + ... + 598.

It is an arithmetic number, because the mean of its divisors is an integer number (4102).

215223 is an apocalyptic number.

15223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15223 is a deficient number, since it is larger than the sum of its proper divisors (1185).

15223 is a wasteful number, since it uses less digits than its factorization.

15223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its digits is 60, while the sum is 13.

The square root of 15223 is about 123.3815221174. The cubic root of 15223 is about 24.7837345651.

Adding to 15223 its reverse (32251), we get a palindrome (47474).

The spelling of 15223 in words is "fifteen thousand, two hundred twenty-three".

Divisors: 1 13 1171 15223