3531 has 8 divisors (see below), whose sum is σ = 5184.
Its totient is φ = 2120.
The previous prime is 3529. The next prime is 3533. The reversal of 3531 is 1353.
Subtracting from 3531 its product of digits (45), we obtain a triangular number (3486 = T83).
Adding to 3531 its reverse (1353), we get a palindrome (4884).
It can be divided in two parts, 35 and 31, that added together give a palindrome (66).
It is a happy number.
3531 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.
It is an interprime number because it is at equal distance from previous prime (3529) and next prime (3533).
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 3531 - 21 = 3529 is a prime.
It is a super-2 number, since 2×35312 = 24935922, which contains 22 as substring.
It is a nialpdrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (3533) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 86.
It is an arithmetic number, because the mean of its divisors is an integer number (648).
23531 is an apocalyptic number.
3531 is a deficient number, since it is larger than the sum of its proper divisors (1653).
3531 is a wasteful number, since it uses less digits than its factorization.
3531 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 121.
The product of its digits is 45, while the sum is 12.
The square root of 3531 is about 59.4222180670.
The cubic root of 3531 is about 15.2276390010.
The spelling of 3531 in words is "three thousand, five hundred thirty-one".