525340240 has 80 divisors (see below), whose sum is σ = 1298809728. Its totient is φ = 197170688.

The previous prime is 525340213. The next prime is 525340247. The reversal of 525340240 is 42043525.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525340247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94827 + ... + 100213.

Almost surely, 2^525340240 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 525340240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649404864).

525340240 is an abundant number, since it is smaller than the sum of its proper divisors (773469488).

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

525340240 is a wasteful number, since it uses less digits than its factorization.

525340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476 (or 5470 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 525340240 is about 22920.3019177322. The cubic root of 525340240 is about 806.8885561607. Note that the first 3 decimals are identical.

Adding to 525340240 its reverse (42043525), we get a palindrome (567383765).

The spelling of 525340240 in words is "five hundred twenty-five million, three hundred forty thousand, two hundred forty".