525505530 has 128 divisors (see below), whose sum is σ = 1466366976. Its totient is φ = 119116800.

The previous prime is 525505517. The next prime is 525505579. The reversal of 525505530 is 35505525.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1587465 + ... + 1587795.

It is an arithmetic number, because the mean of its divisors is an integer number (11455992).

Almost surely, 2^525505530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525505530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733183488).

525505530 is an abundant number, since it is smaller than the sum of its proper divisors (940861446).

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

525505530 is a wasteful number, since it uses less digits than its factorization.

525505530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 525505530 is about 22923.9073894482. The cubic root of 525505530 is about 806.9731721956.

The spelling of 525505530 in words is "five hundred twenty-five million, five hundred five thousand, five hundred thirty".