525579520 has 72 divisors (see below), whose sum is σ = 1325247840. Its totient is φ = 199157760.

The previous prime is 525579511. The next prime is 525579529. The reversal of 525579520 is 25975525.

It is an interprime number because it is at equal distance from previous prime (525579511) and next prime (525579529).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525579529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13515 + ... + 35125.

It is an arithmetic number, because the mean of its divisors is an integer number (18406220).

Almost surely, 2^525579520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525579520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662623920).

525579520 is an abundant number, since it is smaller than the sum of its proper divisors (799668320).

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

525579520 is a wasteful number, since it uses less digits than its factorization.

525579520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21651 (or 21637 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 40.

The square root of 525579520 is about 22925.5211500197. The cubic root of 525579520 is about 807.0110437558.

The spelling of 525579520 in words is "five hundred twenty-five million, five hundred seventy-nine thousand, five hundred twenty".