512500045 has 4 divisors (see below), whose sum is σ = 615000060. Its totient is φ = 410000032.

The previous prime is 512500039. The next prime is 512500057. The reversal of 512500045 is 540005215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 338339236 + 174160809 = 18394^2 + 13197^2 .

It is a cyclic number.

It is not a de Polignac number, because 512500045 - 2⁵ = 512500013 is a prime.

It is a super-2 number, since 2×512500045² = 525312592250004050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 512499989 and 512500025.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51250000 + ... + 51250009.

It is an arithmetic number, because the mean of its divisors is an integer number (153750015).

Almost surely, 2^512500045 is an apocalyptic number.

It is an amenable number.

512500045 is a deficient number, since it is larger than the sum of its proper divisors (102500015).

512500045 is a wasteful number, since it uses less digits than its factorization.

512500045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102500014.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 512500045 is about 22638.4638392273. The cubic root of 512500045 is about 800.2603553638.

The spelling of 512500045 in words is "five hundred twelve million, five hundred thousand, forty-five".