520505557 has 16 divisors (see below), whose sum is σ = 612404352. Its totient is φ = 436144320.

The previous prime is 520505539. The next prime is 520505567. The reversal of 520505557 is 755505025.

It is a cyclic number.

It is not a de Polignac number, because 520505557 - 2⁷ = 520505429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520505567) 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, 111688 + ... + 116254.

It is an arithmetic number, because the mean of its divisors is an integer number (38275272).

Almost surely, 2^520505557 is an apocalyptic number.

It is an amenable number.

520505557 is a deficient number, since it is larger than the sum of its proper divisors (91898795).

520505557 is a wasteful number, since it uses less digits than its factorization.

520505557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5388.

The product of its (nonzero) digits is 43750, while the sum is 34.

The square root of 520505557 is about 22814.5908795227. The cubic root of 520505557 is about 804.4056706484.

The spelling of 520505557 in words is "five hundred twenty million, five hundred five thousand, five hundred fifty-seven".