525291228 has 288 divisors, whose sum is σ = 1788853248. Its totient is φ = 125798400.

The previous prime is 525291209. The next prime is 525291229. The reversal of 525291228 is 822192525.

525291228 is a `hidden beast` number, since 5 + 2 + 529 + 122 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 525291192 and 525291201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525291229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3345726 + ... + 3345882.

It is an arithmetic number, because the mean of its divisors is an integer number (6211296).

Almost surely, 2^525291228 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 525291228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894426624).

525291228 is an abundant number, since it is smaller than the sum of its proper divisors (1263562020).

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

525291228 is a wasteful number, since it uses less digits than its factorization.

525291228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 268 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 525291228 is about 22919.2327096698. The cubic root of 525291228 is about 806.8634622952.

The spelling of 525291228 in words is "five hundred twenty-five million, two hundred ninety-one thousand, two hundred twenty-eight".