531801 has 12 divisors (see below), whose sum is σ = 789412. Its totient is φ = 344736.

The previous prime is 531799. The next prime is 531821. The reversal of 531801 is 108135.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 301401 + 230400 = 549^2 + 480^2 .

It is not a de Polignac number, because 531801 - 2¹ = 531799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466 + ... + 1131.

2⁵³¹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

531801 is a deficient number, since it is larger than the sum of its proper divisors (257611).

531801 is a wasteful number, since it uses less digits than its factorization.

531801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 531801 is about 729.2468717794. The cubic root of 531801 is about 81.0182857665.

Adding to 531801 its reverse (108135), we get a palindrome (639936).

The spelling of 531801 in words is "five hundred thirty-one thousand, eight hundred one".