520513345 has 16 divisors (see below), whose sum is σ = 711027072. Its totient is φ = 362095360.

The previous prime is 520513333. The next prime is 520513381. The reversal of 520513345 is 543315025.

It is a de Polignac number, because none of the positive numbers 2^k-520513345 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204472 + ... + 207001.

It is an arithmetic number, because the mean of its divisors is an integer number (44439192).

Almost surely, 2^520513345 is an apocalyptic number.

520513345 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520513345 is a deficient number, since it is larger than the sum of its proper divisors (190513727).

520513345 is a wasteful number, since it uses less digits than its factorization.

520513345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411512.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 520513345 is about 22814.7615591310. The cubic root of 520513345 is about 804.4096825685.

The spelling of 520513345 in words is "five hundred twenty million, five hundred thirteen thousand, three hundred forty-five".