531616 has 24 divisors (see below), whose sum is σ = 1077300. Its totient is φ = 258048.

The previous prime is 531613. The next prime is 531623. The reversal of 531616 is 616135.

It can be written as a sum of positive squares in 2 ways, for example, as 490000 + 41616 = 700^2 + 204^2 .

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (531611) 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, 960 + ... + 1408.

2⁵³¹⁶¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538650).

531616 is an abundant number, since it is smaller than the sum of its proper divisors (545684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531616 is a wasteful number, since it uses less digits than its factorization.

531616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 488 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 531616 is about 729.1200175554. The cubic root of 531616 is about 81.0088899454.

The spelling of 531616 in words is "five hundred thirty-one thousand, six hundred sixteen".