511340423 has 4 divisors (see below), whose sum is σ = 557825928. Its totient is φ = 464854920.

The previous prime is 511340413. The next prime is 511340429. The reversal of 511340423 is 324043115.

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 511340423 - 2¹² = 511336327 is a prime.

It is a super-2 number, since 2×511340423² = 522938056387637858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511340429) 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, 23242736 + ... + 23242757.

It is an arithmetic number, because the mean of its divisors is an integer number (139456482).

Almost surely, 2^511340423 is an apocalyptic number.

511340423 is a deficient number, since it is larger than the sum of its proper divisors (46485505).

511340423 is a wasteful number, since it uses less digits than its factorization.

511340423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46485504.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 511340423 is about 22612.8375707252. The cubic root of 511340423 is about 799.6563226910.

Adding to 511340423 its reverse (324043115), we get a palindrome (835383538).

The spelling of 511340423 in words is "five hundred eleven million, three hundred forty thousand, four hundred twenty-three".