531291 has 8 divisors (see below), whose sum is σ = 711760. Its totient is φ = 352512.

The previous prime is 531287. The next prime is 531299. The reversal of 531291 is 192135.

531291 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 531291 - 2² = 531287 is a prime.

It is a Duffinian number.

531291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (531299) 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, 1011 + ... + 1443.

It is an arithmetic number, because the mean of its divisors is an integer number (88970).

2⁵³¹²⁹¹ is an apocalyptic number.

531291 is a deficient number, since it is larger than the sum of its proper divisors (180469).

531291 is a wasteful number, since it uses less digits than its factorization.

531291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

The product of its digits is 270, while the sum is 21.

The square root of 531291 is about 728.8971120810. The cubic root of 531291 is about 80.9923784934.

The spelling of 531291 in words is "five hundred thirty-one thousand, two hundred ninety-one".