531545 has 8 divisors (see below), whose sum is σ = 729024. Its totient is φ = 364464.

The previous prime is 531521. The next prime is 531547. The reversal of 531545 is 545135.

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 531545 - 2⁶ = 531481 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 531545.

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 7 ways as a sum of consecutive naturals, for example, 7559 + ... + 7628.

It is an arithmetic number, because the mean of its divisors is an integer number (91128).

2⁵³¹⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

531545 is a deficient number, since it is larger than the sum of its proper divisors (197479).

531545 is a wasteful number, since it uses less digits than its factorization.

531545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15199.

The product of its digits is 1500, while the sum is 23.

The square root of 531545 is about 729.0713271004. The cubic root of 531545 is about 81.0052834028.

The spelling of 531545 in words is "five hundred thirty-one thousand, five hundred forty-five".