531011 has 4 divisors (see below), whose sum is σ = 571872. Its totient is φ = 490152.

The previous prime is 530989. The next prime is 531017. The reversal of 531011 is 110135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110135 = 5 ⋅22027.

It is not a de Polignac number, because 531011 - 2⁶ = 530947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 530983 and 531001.

It is not an unprimeable number, because it can be changed into a prime (531017) 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 3 ways as a sum of consecutive naturals, for example, 20411 + ... + 20436.

It is an arithmetic number, because the mean of its divisors is an integer number (142968).

2⁵³¹⁰¹¹ is an apocalyptic number.

531011 is a deficient number, since it is larger than the sum of its proper divisors (40861).

531011 is a wasteful number, since it uses less digits than its factorization.

531011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40860.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 531011 is about 728.7050157643. The cubic root of 531011 is about 80.9781478420.

Adding to 531011 its reverse (110135), we get a palindrome (641146).

The spelling of 531011 in words is "five hundred thirty-one thousand, eleven".