513220545 has 12 divisors (see below), whose sum is σ = 889582356. Its totient is φ = 273717600.

The previous prime is 513220439. The next prime is 513220573. The reversal of 513220545 is 545022315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 392396481 + 120824064 = 19809^2 + 10992^2 .

It is not a de Polignac number, because 513220545 - 2⁷ = 513220417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5702406 + ... + 5702495.

It is an arithmetic number, because the mean of its divisors is an integer number (74131863).

Almost surely, 2^513220545 is an apocalyptic number.

It is an amenable number.

513220545 is a deficient number, since it is larger than the sum of its proper divisors (376361811).

513220545 is a wasteful number, since it uses less digits than its factorization.

513220545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11404912 (or 11404909 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 513220545 is about 22654.3714324631. The cubic root of 513220545 is about 800.6351960448.

The spelling of 513220545 in words is "five hundred thirteen million, two hundred twenty thousand, five hundred forty-five".