511432423 has 4 divisors (see below), whose sum is σ = 511652680. Its totient is φ = 511212168.

The previous prime is 511432421. The next prime is 511432447. The reversal of 511432423 is 324234115.

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 511432423 - 2¹ = 511432421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511432421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106608 + ... + 111301.

It is an arithmetic number, because the mean of its divisors is an integer number (127913170).

Almost surely, 2^511432423 is an apocalyptic number.

511432423 is a deficient number, since it is larger than the sum of its proper divisors (220257).

511432423 is a wasteful number, since it uses less digits than its factorization.

511432423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220256.

The product of its digits is 2880, while the sum is 25.

The square root of 511432423 is about 22614.8717219444. The cubic root of 511432423 is about 799.7042776780.

Adding to 511432423 its reverse (324234115), we get a palindrome (835666538).

The spelling of 511432423 in words is "five hundred eleven million, four hundred thirty-two thousand, four hundred twenty-three".