521080505 has 16 divisors (see below), whose sum is σ = 685584000. Its totient is φ = 377055360.

The previous prime is 521080463. The next prime is 521080517. The reversal of 521080505 is 505080125.

It is not a de Polignac number, because 521080505 - 2²⁶ = 453971641 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 15 ways as a sum of consecutive naturals, for example, 12860 + ... + 34749.

It is an arithmetic number, because the mean of its divisors is an integer number (42849000).

Almost surely, 2^521080505 is an apocalyptic number.

521080505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521080505 is a deficient number, since it is larger than the sum of its proper divisors (164503495).

521080505 is a wasteful number, since it uses less digits than its factorization.

521080505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47824.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 521080505 is about 22827.1878469513. The cubic root of 521080505 is about 804.7017425738.

The spelling of 521080505 in words is "five hundred twenty-one million, eighty thousand, five hundred five".