215655160 has 64 divisors (see below), whose sum is σ = 556139520. Its totient is φ = 73726080.

The previous prime is 215655151. The next prime is 215655173. The reversal of 215655160 is 61556512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119787 + ... + 121573.

It is an arithmetic number, because the mean of its divisors is an integer number (8689680).

Almost surely, 2^215655160 is an apocalyptic number.

215655160 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 215655160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278069760).

215655160 is an abundant number, since it is smaller than the sum of its proper divisors (340484360).

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

215655160 is a wasteful number, since it uses less digits than its factorization.

215655160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 215655160 is about 14685.2020755589. The cubic root of 215655160 is about 599.6805336360.

The spelling of 215655160 in words is "two hundred fifteen million, six hundred fifty-five thousand, one hundred sixty".