521105130 has 256 divisors, whose sum is σ = 1734082560. Its totient is φ = 108428544.

The previous prime is 521105107. The next prime is 521105149. The reversal of 521105130 is 31501125.

521105130 is a `hidden beast` number, since 521 + 10 + 5 + 130 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3120307 + ... + 3120473.

It is an arithmetic number, because the mean of its divisors is an integer number (6773760).

Almost surely, 2^521105130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521105130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867041280).

521105130 is an abundant number, since it is smaller than the sum of its proper divisors (1212977430).

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

521105130 is a wasteful number, since it uses less digits than its factorization.

521105130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 521105130 is about 22827.7272193269. The cubic root of 521105130 is about 804.7144184579.

Adding to 521105130 its reverse (31501125), we get a palindrome (552606255).

The spelling of 521105130 in words is "five hundred twenty-one million, one hundred five thousand, one hundred thirty".