103531 has 4 divisors (see below), whose sum is σ = 109000. Its totient is φ = 98064.

The previous prime is 103529. The next prime is 103549. The reversal of 103531 is 135301.

103531 = T₅₄ + T₅₅ + ... + T₉₁.

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

It is a cyclic number.

It is not a de Polignac number, because 103531 - 2¹ = 103529 is a prime.

It is a super-2 number, since 2×103531² = 21437335922, which contains 22 as substring.

It is a Duffinian number.

103531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (103511) 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, 2706 + ... + 2743.

It is an arithmetic number, because the mean of its divisors is an integer number (27250).

2¹⁰³⁵³¹ is an apocalyptic number.

103531 is the 204-th centered pentagonal number.

103531 is a deficient number, since it is larger than the sum of its proper divisors (5469).

103531 is an equidigital number, since it uses as much as digits as its factorization.

103531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468.

The product of its (nonzero) digits is 45, while the sum is 13.

The square root of 103531 is about 321.7623346509. The cubic root of 103531 is about 46.9558964574.

Adding to 103531 its reverse (135301), we get a palindrome (238832).

The spelling of 103531 in words is "one hundred three thousand, five hundred thirty-one".