512040509 has 8 divisors (see below), whose sum is σ = 514326840. Its totient is φ = 509760000.

The previous prime is 512040491. The next prime is 512040511. The reversal of 512040509 is 905040215.

It can be written as a sum of positive squares in 4 ways, for example, as 51079609 + 460960900 = 7147^2 + 21470^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-512040509 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 (512043509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283409 + ... + 285209.

It is an arithmetic number, because the mean of its divisors is an integer number (64290855).

Almost surely, 2^512040509 is an apocalyptic number.

It is an amenable number.

512040509 is a deficient number, since it is larger than the sum of its proper divisors (2286331).

512040509 is a wasteful number, since it uses less digits than its factorization.

512040509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 512040509 is about 22628.3121111584. The cubic root of 512040509 is about 800.0210978811.

The spelling of 512040509 in words is "five hundred twelve million, forty thousand, five hundred nine".