511434023 has 4 divisors (see below), whose sum is σ = 512899800. Its totient is φ = 509968248.

The previous prime is 511434019. The next prime is 511434043. The reversal of 511434023 is 320434115.

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 511434023 - 2² = 511434019 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 511434023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511434013) 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, 732365 + ... + 733062.

It is an arithmetic number, because the mean of its divisors is an integer number (128224950).

Almost surely, 2^511434023 is an apocalyptic number.

511434023 is a deficient number, since it is larger than the sum of its proper divisors (1465777).

511434023 is a wasteful number, since it uses less digits than its factorization.

511434023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465776.

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

The square root of 511434023 is about 22614.9070968686. The cubic root of 511434023 is about 799.7051116269.

Adding to 511434023 its reverse (320434115), we get a palindrome (831868138).

The spelling of 511434023 in words is "five hundred eleven million, four hundred thirty-four thousand, twenty-three".