531663 has 8 divisors (see below), whose sum is σ = 773376. Its totient is φ = 322200.

The previous prime is 531637. The next prime is 531667. The reversal of 531663 is 366135.

531663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531663 - 2⁵ = 531631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531667) 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, 8023 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (96672).

2⁵³¹⁶⁶³ is an apocalyptic number.

531663 is a deficient number, since it is larger than the sum of its proper divisors (241713).

531663 is a wasteful number, since it uses less digits than its factorization.

531663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16125.

The product of its digits is 1620, while the sum is 24.

The square root of 531663 is about 729.1522474765. The cubic root of 531663 is about 81.0112771983.

Adding to 531663 its reverse (366135), we get a palindrome (897798).

The spelling of 531663 in words is "five hundred thirty-one thousand, six hundred sixty-three".