1000005520 has 20 divisors (see below), whose sum is σ = 2325013020. Its totient is φ = 400002176.

The previous prime is 1000005491. The next prime is 1000005527. The reversal of 1000005520 is 255000001.

It can be written as a sum of positive squares in 2 ways, for example, as 785793024 + 214212496 = 28032^2 + 14636^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1000005520² = 2000022080060940800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1000005520.

It is not an unprimeable number, because it can be changed into a prime (1000005527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6249955 + ... + 6250114.

It is an arithmetic number, because the mean of its divisors is an integer number (116250651).

Almost surely, 2^1000005520 is an apocalyptic number.

1000005520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000005520 is an abundant number, since it is smaller than the sum of its proper divisors (1325007500).

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

1000005520 is a wasteful number, since it uses less digits than its factorization.

1000005520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12500082 (or 12500076 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 1000005520 is about 31622.8638804268. The cubic root of 1000005520 is about 1000.0018399966.

Adding to 1000005520 its reverse (255000001), we get a palindrome (1255005521).

The spelling of 1000005520 in words is "one billion, five thousand, five hundred twenty".