215280912 has 240 divisors, whose sum is σ = 723650112. Its totient is φ = 54512640.

The previous prime is 215280899. The next prime is 215280931. The reversal of 215280912 is 219082512.

It is a self number, because there is not a number n which added to its sum of digits gives 215280912.

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 47 ways as a sum of consecutive naturals, for example, 1371138 + ... + 1371294.

Almost surely, 2^215280912 is an apocalyptic number.

215280912 is a gapful number since it is divisible by the number (22) 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 215280912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361825056).

215280912 is an abundant number, since it is smaller than the sum of its proper divisors (508369200).

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

215280912 is a wasteful number, since it uses less digits than its factorization.

215280912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 215280912 is about 14672.4541914432. The cubic root of 215280912 is about 599.3334375428. Note that the first 3 decimals are identical.

The spelling of 215280912 in words is "two hundred fifteen million, two hundred eighty thousand, nine hundred twelve".