525545130 has 128 divisors (see below), whose sum is σ = 1468108800. Its totient is φ = 119059200.

The previous prime is 525545063. The next prime is 525545131. The reversal of 525545130 is 31545525.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (525545131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 494800 + ... + 495860.

It is an arithmetic number, because the mean of its divisors is an integer number (11469600).

Almost surely, 2^525545130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525545130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734054400).

525545130 is an abundant number, since it is smaller than the sum of its proper divisors (942563670).

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

525545130 is a wasteful number, since it uses less digits than its factorization.

525545130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 525545130 is about 22924.7711002749. The cubic root of 525545130 is about 806.9934417792.

The spelling of 525545130 in words is "five hundred twenty-five million, five hundred forty-five thousand, one hundred thirty".