215441280 has 192 divisors, whose sum is σ = 752796720. Its totient is φ = 56770560.

The previous prime is 215441263. The next prime is 215441287. The reversal of 215441280 is 82144512.

215441280 is a `hidden beast` number, since 215 + 441 + 2 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215441287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 650715 + ... + 651045.

Almost surely, 2^215441280 is an apocalyptic number.

215441280 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 215441280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376398360).

215441280 is an abundant number, since it is smaller than the sum of its proper divisors (537355440).

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

215441280 is a wasteful number, since it uses less digits than its factorization.

215441280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 215441280 is about 14677.9181085057. The cubic root of 215441280 is about 599.4822199683.

Adding to 215441280 its reverse (82144512), we get a palindrome (297585792).

It can be divided in two parts, 2154 and 41280, that added together give a palindrome (43434).

The spelling of 215441280 in words is "two hundred fifteen million, four hundred forty-one thousand, two hundred eighty".