531431 has 8 divisors (see below), whose sum is σ = 558144. Its totient is φ = 505440.

The previous prime is 531383. The next prime is 531457. The reversal of 531431 is 134135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531431 is a prime.

It is a super-2 number, since 2×531431² = 564837815522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 531431.

It is not an unprimeable number, because it can be changed into a prime (531481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1826 + ... + 2096.

It is an arithmetic number, because the mean of its divisors is an integer number (69768).

531431 is a Friedman number, since it can be written as (3^3)^4-5*(1+1), using all its digits and the basic arithmetic operations.

2⁵³¹⁴³¹ is an apocalyptic number.

531431 is a deficient number, since it is larger than the sum of its proper divisors (26713).

531431 is a wasteful number, since it uses less digits than its factorization.

531431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its digits is 180, while the sum is 17.

The square root of 531431 is about 728.9931412572. The cubic root of 531431 is about 80.9994919442. Note that the first 3 decimals are identical.

Adding to 531431 its reverse (134135), we get a palindrome (665566).

The spelling of 531431 in words is "five hundred thirty-one thousand, four hundred thirty-one".