513375745 has 4 divisors (see below), whose sum is σ = 616050900. Its totient is φ = 410700592.

The previous prime is 513375727. The next prime is 513375749. The reversal of 513375745 is 547573315.

It is a happy number.

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 243890689 + 269485056 = 15617^2 + 16416^2 .

It is a cyclic number.

It is not a de Polignac number, because 513375745 - 2¹¹ = 513373697 is a prime.

It is a Smith number, since the sum of its digits (40) 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 = 513375698 and 513375707.

It is not an unprimeable number, because it can be changed into a prime (513375749) 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, 51337570 + ... + 51337579.

It is an arithmetic number, because the mean of its divisors is an integer number (154012725).

Almost surely, 2^513375745 is an apocalyptic number.

It is an amenable number.

513375745 is a deficient number, since it is larger than the sum of its proper divisors (102675155).

513375745 is a wasteful number, since it uses less digits than its factorization.

513375745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102675154.

The product of its digits is 220500, while the sum is 40.

The square root of 513375745 is about 22657.7965610074. The cubic root of 513375745 is about 800.7158930345.

The spelling of 513375745 in words is "five hundred thirteen million, three hundred seventy-five thousand, seven hundred forty-five".