531245250 has 128 divisors (see below), whose sum is σ = 1484271360. Its totient is φ = 140616000.

The previous prime is 531245249. The next prime is 531245261. The reversal of 531245250 is 52542135.

It is a happy number.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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

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, 1424064 + ... + 1424436.

It is an arithmetic number, because the mean of its divisors is an integer number (11595870).

Almost surely, 2^531245250 is an apocalyptic number.

531245250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 531245250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742135680).

531245250 is an abundant number, since it is smaller than the sum of its proper divisors (953026110).

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

531245250 is a wasteful number, since it uses less digits than its factorization.

531245250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 594 counting only the distinct ones).

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

The square root of 531245250 is about 23048.7581010344. The cubic root of 531245250 is about 809.9005364838.

Adding to 531245250 its reverse (52542135), we get a palindrome (583787385).

The spelling of 531245250 in words is "five hundred thirty-one million, two hundred forty-five thousand, two hundred fifty".