520665500 has 96 divisors (see below), whose sum is σ = 1185632448. Its totient is φ = 199584000.

The previous prime is 520665473. The next prime is 520665503. The reversal of 520665500 is 5566025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520665503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1311302 + ... + 1311698.

It is an arithmetic number, because the mean of its divisors is an integer number (12350338).

Almost surely, 2^520665500 is an apocalyptic number.

520665500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520665500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592816224).

520665500 is an abundant number, since it is smaller than the sum of its proper divisors (664966948).

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

520665500 is a wasteful number, since it uses less digits than its factorization.

520665500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 520665500 is about 22818.0958890088. The cubic root of 520665500 is about 804.4880558592.

It can be divided in two parts, 5 and 20665500, that multiplied together give a triangular number (103327500 = T₁₄₃₇₅).

The spelling of 520665500 in words is "five hundred twenty million, six hundred sixty-five thousand, five hundred".