215625000 has 144 divisors (see below), whose sum is σ = 703124640. Its totient is φ = 55000000.

The previous prime is 215624993. The next prime is 215625019. The reversal of 215625000 is 526512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9374989 + ... + 9375011.

It is an arithmetic number, because the mean of its divisors is an integer number (4882810).

Almost surely, 2^215625000 is an apocalyptic number.

215625000 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 215625000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351562320).

215625000 is an abundant number, since it is smaller than the sum of its proper divisors (487499640).

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

215625000 is an frugal number, since it uses more digits than its factorization.

215625000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 215625000 is about 14684.1751555884. The cubic root of 215625000 is about 599.6525766450.

It can be divided in two parts, 21562 and 5000, that added together give a palindrome (26562).

The spelling of 215625000 in words is "two hundred fifteen million, six hundred twenty-five thousand".