215344040 has 16 divisors (see below), whose sum is σ = 484524180. Its totient is φ = 86137600.

The previous prime is 215344037. The next prime is 215344067. The reversal of 215344040 is 40443512.

It can be written as a sum of positive squares in 2 ways, for example, as 212634724 + 2709316 = 14582^2 + 1646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 215343997 and 215344015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691761 + ... + 2691840.

Almost surely, 2^215344040 is an apocalyptic number.

215344040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215344040 is an abundant number, since it is smaller than the sum of its proper divisors (269180140).

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

215344040 is a wasteful number, since it uses less digits than its factorization.

215344040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383612 (or 5383608 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 215344040 is about 14674.6052757817. The cubic root of 215344040 is about 599.3920137589.

Adding to 215344040 its reverse (40443512), we get a palindrome (255787552).

The spelling of 215344040 in words is "two hundred fifteen million, three hundred forty-four thousand, forty".