531541 has 4 divisors (see below), whose sum is σ = 549900. Its totient is φ = 513184.

The previous prime is 531521. The next prime is 531547. The reversal of 531541 is 145135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145135 = 5 ⋅29027.

It can be written as a sum of positive squares in 2 ways, for example, as 271441 + 260100 = 521^2 + 510^2 .

It is not a de Polignac number, because 531541 - 2¹³ = 523349 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531547) 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, 9136 + ... + 9193.

It is an arithmetic number, because the mean of its divisors is an integer number (137475).

2⁵³¹⁵⁴¹ is an apocalyptic number.

It is an amenable number.

531541 is a deficient number, since it is larger than the sum of its proper divisors (18359).

531541 is a wasteful number, since it uses less digits than its factorization.

531541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18358.

The product of its digits is 300, while the sum is 19.

The square root of 531541 is about 729.0685838795. The cubic root of 531541 is about 81.0050802077.

Adding to 531541 its reverse (145135), we get a palindrome (676676).

It can be divided in two parts, 5315 and 41, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 531541 in words is "five hundred thirty-one thousand, five hundred forty-one".