512045809 has 4 divisors (see below), whose sum is σ = 558595440. Its totient is φ = 465496180.

The previous prime is 512045771. The next prime is 512045819. The reversal of 512045809 is 908540215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 512045809 - 2¹⁵ = 512013041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512045819) 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, 23274799 + ... + 23274820.

It is an arithmetic number, because the mean of its divisors is an integer number (139648860).

Almost surely, 2^512045809 is an apocalyptic number.

It is an amenable number.

512045809 is a deficient number, since it is larger than the sum of its proper divisors (46549631).

512045809 is a wasteful number, since it uses less digits than its factorization.

512045809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46549630.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 512045809 is about 22628.4292207833. The cubic root of 512045809 is about 800.0238581426.

The spelling of 512045809 in words is "five hundred twelve million, forty-five thousand, eight hundred nine".