215800260 has 144 divisors (see below), whose sum is σ = 681543744. Its totient is φ = 50713344.

The previous prime is 215800253. The next prime is 215800267. The reversal of 215800260 is 62008512.

It is an interprime number because it is at equal distance from previous prime (215800253) and next prime (215800267).

It is a self number, because there is not a number n which added to its sum of digits gives 215800260.

It is not an unprimeable number, because it can be changed into a prime (215800267) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 412359 + ... + 412881.

Almost surely, 2^215800260 is an apocalyptic number.

215800260 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 215800260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340771872).

215800260 is an abundant number, since it is smaller than the sum of its proper divisors (465743484).

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

215800260 is a wasteful number, since it uses less digits than its factorization.

215800260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 215800260 is about 14690.1415922380. The cubic root of 215800260 is about 599.8149985188.

Adding to 215800260 its reverse (62008512), we get a palindrome (277808772).

The spelling of 215800260 in words is "two hundred fifteen million, eight hundred thousand, two hundred sixty".