531211323 has 4 divisors (see below), whose sum is σ = 708281768. Its totient is φ = 354140880.

The previous prime is 531211297. The next prime is 531211337. The reversal of 531211323 is 323112135.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 531211323 - 2⁶ = 531211259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531211323.

It is not an unprimeable number, because it can be changed into a prime (531211423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88535218 + ... + 88535223.

It is an arithmetic number, because the mean of its divisors is an integer number (177070442).

Almost surely, 2^531211323 is an apocalyptic number.

531211323 is a deficient number, since it is larger than the sum of its proper divisors (177070445).

531211323 is a wasteful number, since it uses less digits than its factorization.

531211323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177070444.

The product of its digits is 540, while the sum is 21.

The square root of 531211323 is about 23048.0221060290. The cubic root of 531211323 is about 809.8832951811.

Adding to 531211323 its reverse (323112135), we get a palindrome (854323458).

The spelling of 531211323 in words is "five hundred thirty-one million, two hundred eleven thousand, three hundred twenty-three".