520345705 has 16 divisors (see below), whose sum is σ = 682161984. Its totient is φ = 377887680.

The previous prime is 520345703. The next prime is 520345717. The reversal of 520345705 is 507543025.

It is not a de Polignac number, because 520345705 - 2¹ = 520345703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520345703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33862 + ... + 46768.

It is an arithmetic number, because the mean of its divisors is an integer number (42635124).

Almost surely, 2^520345705 is an apocalyptic number.

520345705 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

520345705 is a deficient number, since it is larger than the sum of its proper divisors (161816279).

520345705 is a wasteful number, since it uses less digits than its factorization.

520345705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13656.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 520345705 is about 22811.0873261228. The cubic root of 520345705 is about 804.3233154465.

The spelling of 520345705 in words is "five hundred twenty million, three hundred forty-five thousand, seven hundred five".