525531240 has 192 divisors, whose sum is σ = 1907942400. Its totient is φ = 129330432.

The previous prime is 525531233. The next prime is 525531257. The reversal of 525531240 is 42135525.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124281 + ... + 128439.

It is an arithmetic number, because the mean of its divisors is an integer number (9937200).

Almost surely, 2^525531240 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 525531240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953971200).

525531240 is an abundant number, since it is smaller than the sum of its proper divisors (1382411160).

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

525531240 is a wasteful number, since it uses less digits than its factorization.

525531240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198 (or 4182 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 525531240 is about 22924.4681508645. The cubic root of 525531240 is about 806.9863321851.

Adding to 525531240 its reverse (42135525), we get a palindrome (567666765).

The spelling of 525531240 in words is "five hundred twenty-five million, five hundred thirty-one thousand, two hundred forty".