215841000 has 64 divisors (see below), whose sum is σ = 673433280. Its totient is φ = 57556800.

The previous prime is 215840981. The next prime is 215841001. The reversal of 215841000 is 148512.

It is not an unprimeable number, because it can be changed into a prime (215841001) 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, 32974 + ... + 38973.

It is an arithmetic number, because the mean of its divisors is an integer number (10522395).

Almost surely, 2^215841000 is an apocalyptic number.

215841000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215841000 is an abundant number, since it is smaller than the sum of its proper divisors (457592280).

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

215841000 is a wasteful number, since it uses less digits than its factorization.

215841000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71971 (or 71957 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 215841000 is about 14691.5281710243. The cubic root of 215841000 is about 599.8527416390.

Adding to 215841000 its reverse (148512), we get a palindrome (215989512).

The spelling of 215841000 in words is "two hundred fifteen million, eight hundred forty-one thousand".