215422560 has 144 divisors (see below), whose sum is σ = 739655280. Its totient is φ = 57093120.

The previous prime is 215422553. The next prime is 215422583. The reversal of 215422560 is 65224512.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 303486 + ... + 304194.

It is an arithmetic number, because the mean of its divisors is an integer number (5136495).

Almost surely, 2^215422560 is an apocalyptic number.

215422560 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 215422560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369827640).

215422560 is an abundant number, since it is smaller than the sum of its proper divisors (524232720).

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

215422560 is a wasteful number, since it uses less digits than its factorization.

215422560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 215422560 is about 14677.2804020363. The cubic root of 215422560 is about 599.4648561770.

The spelling of 215422560 in words is "two hundred fifteen million, four hundred twenty-two thousand, five hundred sixty".