215265500 has 48 divisors (see below), whose sum is σ = 472215744. Its totient is φ = 85726400.

The previous prime is 215265481. The next prime is 215265503. The reversal of 215265500 is 5562512.

215265500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 215265500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215265503) 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, 130682 + ... + 132318.

It is an arithmetic number, because the mean of its divisors is an integer number (9837828).

Almost surely, 2^215265500 is an apocalyptic number.

215265500 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 215265500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236107872).

215265500 is an abundant number, since it is smaller than the sum of its proper divisors (256950244).

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

215265500 is a wasteful number, since it uses less digits than its factorization.

215265500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 215265500 is about 14671.9289801989. The cubic root of 215265500 is about 599.3191350712.

The spelling of 215265500 in words is "two hundred fifteen million, two hundred sixty-five thousand, five hundred".