52521000 has 256 divisors, whose sum is σ = 194987520. Its totient is φ = 11520000.

The previous prime is 52520981. The next prime is 52521047. The reversal of 52521000 is 12525.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 860970 + ... + 861030.

It is an arithmetic number, because the mean of its divisors is an integer number (761670).

Almost surely, 2^52521000 is an apocalyptic number.

52521000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52521000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97493760).

52521000 is an abundant number, since it is smaller than the sum of its proper divisors (142466520).

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

52521000 is a wasteful number, since it uses less digits than its factorization.

52521000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 52521000 is about 7247.1373658845. The cubic root of 52521000 is about 374.4935385215.

Adding to 52521000 its reverse (12525), we get a palindrome (52533525).

The spelling of 52521000 in words is "fifty-two million, five hundred twenty-one thousand".