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13231 = 101131
BaseRepresentation
bin11001110101111
3200011001
43032233
5410411
6141131
753401
oct31657
920131
1013231
119a39
1277a7
13603a
144b71
153dc1
hex33af

13231 has 4 divisors (see below), whose sum is σ = 13464. Its totient is φ = 13000.

The previous prime is 13229. The next prime is 13241.

13231 is nontrivially palindromic in base 10.

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 is a cyclic number.

It is not a de Polignac number, because 13231 - 21 = 13229 is a prime.

It is a super-2 number, since 2×132312 = 350118722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13241) 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, 36 + ... + 166.

It is an arithmetic number, because the mean of its divisors is an integer number (3366).

213231 is an apocalyptic number.

13231 is a deficient number, since it is larger than the sum of its proper divisors (233).

13231 is a wasteful number, since it uses less digits than its factorization.

13231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232.

The product of its digits is 18, while the sum is 10.

The square root of 13231 is about 115.0260839984. The cubic root of 13231 is about 23.6518013727.

It can be divided in two parts, 13 and 231, that multiplied together give a palindrome (3003).

The spelling of 13231 in words is "thirteen thousand, two hundred thirty-one".

Divisors: 1 101 131 13231