252221500 has 48 divisors (see below), whose sum is σ = 559147680. Its totient is φ = 99369600.

The previous prime is 252221467. The next prime is 252221507. The reversal of 252221500 is 5122252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252221507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29736 + ... + 37264.

It is an arithmetic number, because the mean of its divisors is an integer number (11648910).

Almost surely, 2^252221500 is an apocalyptic number.

252221500 is a gapful number since it is divisible by the number (20) 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 252221500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279573840).

252221500 is an abundant number, since it is smaller than the sum of its proper divisors (306926180).

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

252221500 is a wasteful number, since it uses less digits than its factorization.

252221500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615 (or 7603 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 252221500 is about 15881.4829282407. The cubic root of 252221500 is about 631.8209682229.

Adding to 252221500 its reverse (5122252), we get a palindrome (257343752).

The spelling of 252221500 in words is "two hundred fifty-two million, two hundred twenty-one thousand, five hundred".