520010100 has 108 divisors (see below), whose sum is σ = 1634543820. Its totient is φ = 138278400.

The previous prime is 520010077. The next prime is 520010119. The reversal of 520010100 is 1010025.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 156650256 + 363359844 = 12516^2 + 19062^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 468346 + ... + 469454.

It is an arithmetic number, because the mean of its divisors is an integer number (15134665).

Almost surely, 2^520010100 is an apocalyptic number.

520010100 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 520010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817271910).

520010100 is an abundant number, since it is smaller than the sum of its proper divisors (1114533720).

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

520010100 is a wasteful number, since it uses less digits than its factorization.

520010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 520010100 is about 22803.7299580573. The cubic root of 520010100 is about 804.1503580085.

Adding to 520010100 its reverse (1010025), we get a palindrome (521020125).

The spelling of 520010100 in words is "five hundred twenty million, ten thousand, one hundred".