525501240 has 256 divisors, whose sum is σ = 1891123200. Its totient is φ = 115315200.

The previous prime is 525501233. The next prime is 525501241. The reversal of 525501240 is 42105525.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 525501240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525501241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 576385 + ... + 577295.

It is an arithmetic number, because the mean of its divisors is an integer number (7387200).

Almost surely, 2^525501240 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 525501240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945561600).

525501240 is an abundant number, since it is smaller than the sum of its proper divisors (1365621960).

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

525501240 is a wasteful number, since it uses less digits than its factorization.

525501240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 525501240 is about 22923.8138188217. The cubic root of 525501240 is about 806.9709762629.

Adding to 525501240 its reverse (42105525), we get a palindrome (567606765).

The spelling of 525501240 in words is "five hundred twenty-five million, five hundred one thousand, two hundred forty".