505161520 has 40 divisors (see below), whose sum is σ = 1177670160. Its totient is φ = 201519360.

The previous prime is 505161467. The next prime is 505161529. The reversal of 505161520 is 25161505.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×505161520² = 510376322577420800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505161529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21990 + ... + 38650.

It is an arithmetic number, because the mean of its divisors is an integer number (29441754).

Almost surely, 2^505161520 is an apocalyptic number.

It is an amenable number.

505161520 is an abundant number, since it is smaller than the sum of its proper divisors (672508640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505161520 is a wasteful number, since it uses less digits than its factorization.

505161520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17053 (or 17047 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 505161520 is about 22475.7985397627. The cubic root of 505161520 is about 796.4223157367.

The spelling of 505161520 in words is "five hundred five million, one hundred sixty-one thousand, five hundred twenty".