531633 has 4 divisors (see below), whose sum is σ = 708848. Its totient is φ = 354420.

The previous prime is 531631. The next prime is 531637. The reversal of 531633 is 336135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 531633 - 2¹ = 531631 is a prime.

It is a d-powerful number, because it can be written as 5³ + 3 + 6² + 1 + 3³ + 3¹² .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531631) 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, 88603 + ... + 88608.

It is an arithmetic number, because the mean of its divisors is an integer number (177212).

2⁵³¹⁶³³ is an apocalyptic number.

It is an amenable number.

531633 is a deficient number, since it is larger than the sum of its proper divisors (177215).

531633 is a wasteful number, since it uses less digits than its factorization.

531633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177214.

The product of its digits is 810, while the sum is 21.

The square root of 531633 is about 729.1316753509. The cubic root of 531633 is about 81.0097534361.

Adding to 531633 its reverse (336135), we get a palindrome (867768).

The spelling of 531633 in words is "five hundred thirty-one thousand, six hundred thirty-three".