215047140 has 192 divisors, whose sum is σ = 760596480. Its totient is φ = 44098560.

The previous prime is 215047121. The next prime is 215047163. The reversal of 215047140 is 41740512.

It is a self number, because there is not a number n which added to its sum of digits gives 215047140.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 410919 + ... + 411441.

It is an arithmetic number, because the mean of its divisors is an integer number (3961440).

Almost surely, 2^215047140 is an apocalyptic number.

215047140 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 215047140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380298240).

215047140 is an abundant number, since it is smaller than the sum of its proper divisors (545549340).

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

215047140 is a wasteful number, since it uses less digits than its factorization.

215047140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 215047140 is about 14664.4856711717. The cubic root of 215047140 is about 599.1164216765.

Adding to 215047140 its reverse (41740512), we get a palindrome (256787652).

The spelling of 215047140 in words is "two hundred fifteen million, forty-seven thousand, one hundred forty".