513240645 has 16 divisors (see below), whose sum is σ = 822032640. Its totient is φ = 273445824.

The previous prime is 513240617. The next prime is 513240649. The reversal of 513240645 is 546042315.

It is not a de Polignac number, because 513240645 - 2¹⁰ = 513239621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513240649) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2205 + ... + 32114.

It is an arithmetic number, because the mean of its divisors is an integer number (51377040).

Almost surely, 2^513240645 is an apocalyptic number.

It is an amenable number.

513240645 is a deficient number, since it is larger than the sum of its proper divisors (308791995).

513240645 is a wasteful number, since it uses less digits than its factorization.

513240645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35324.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 513240645 is about 22654.8150511100. The cubic root of 513240645 is about 800.6456480539.

The spelling of 513240645 in words is "five hundred thirteen million, two hundred forty thousand, six hundred forty-five".