520142900 has 36 divisors (see below), whose sum is σ = 1129763628. Its totient is φ = 207863040.

The previous prime is 520142837. The next prime is 520142923. The reversal of 520142900 is 9241025.

It can be written as a sum of positive squares in 6 ways, for example, as 5579044 + 514563856 = 2362^2 + 22684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158072 + ... + 161328.

It is an arithmetic number, because the mean of its divisors is an integer number (31382323).

Almost surely, 2^520142900 is an apocalyptic number.

520142900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

520142900 is an abundant number, since it is smaller than the sum of its proper divisors (609620728).

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

520142900 is a wasteful number, since it uses less digits than its factorization.

520142900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868 (or 4861 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 520142900 is about 22806.6415765233. The cubic root of 520142900 is about 804.2188067290.

Adding to 520142900 its reverse (9241025), we get a palindrome (529383925).

The spelling of 520142900 in words is "five hundred twenty million, one hundred forty-two thousand, nine hundred".