531553 has 12 divisors (see below), whose sum is σ = 612864. Its totient is φ = 459800.

The previous prime is 531551. The next prime is 531569. The reversal of 531553 is 355135.

It is a happy number.

It is not a de Polignac number, because 531553 - 2¹ = 531551 is a prime.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (1125) is a multiple of the sum of its prime divisors (225).

It is not an unprimeable number, because it can be changed into a prime (531551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2688 + ... + 2878.

It is an arithmetic number, because the mean of its divisors is an integer number (51072).

2⁵³¹⁵⁵³ is an apocalyptic number.

It is an amenable number.

531553 is a deficient number, since it is larger than the sum of its proper divisors (81311).

531553 is a wasteful number, since it uses less digits than its factorization.

531553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 225 counting only the distinct ones).

The product of its digits is 1125, while the sum is 22.

The square root of 531553 is about 729.0768135114. The cubic root of 531553 is about 81.0056897898.

Adding to 531553 its reverse (355135), we get a palindrome (886688).

The spelling of 531553 in words is "five hundred thirty-one thousand, five hundred fifty-three".