511431323 has 4 divisors (see below), whose sum is σ = 550772208. Its totient is φ = 472090440.

The previous prime is 511431311. The next prime is 511431331. The reversal of 511431323 is 323134115.

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

It is a cyclic number.

It is not a de Polignac number, because 511431323 - 2⁴ = 511431307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511431023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19670423 + ... + 19670448.

It is an arithmetic number, because the mean of its divisors is an integer number (137693052).

Almost surely, 2^511431323 is an apocalyptic number.

511431323 is a deficient number, since it is larger than the sum of its proper divisors (39340885).

511431323 is a wasteful number, since it uses less digits than its factorization.

511431323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39340884.

The product of its digits is 1080, while the sum is 23.

The square root of 511431323 is about 22614.8474016519. The cubic root of 511431323 is about 799.7037043371.

Adding to 511431323 its reverse (323134115), we get a palindrome (834565438).

The spelling of 511431323 in words is "five hundred eleven million, four hundred thirty-one thousand, three hundred twenty-three".