215040343 has 4 divisors (see below), whose sum is σ = 245760400. Its totient is φ = 184320288.

The previous prime is 215040289. The next prime is 215040349. The reversal of 215040343 is 343040512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215040343 - 2¹⁷ = 214909271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215040349) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15360018 + ... + 15360031.

It is an arithmetic number, because the mean of its divisors is an integer number (61440100).

Almost surely, 2^215040343 is an apocalyptic number.

215040343 is a deficient number, since it is larger than the sum of its proper divisors (30720057).

215040343 is an equidigital number, since it uses as much as digits as its factorization.

215040343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30720056.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 215040343 is about 14664.2539189691. The cubic root of 215040343 is about 599.1101095144.

Adding to 215040343 its reverse (343040512), we get a palindrome (558080855).

The spelling of 215040343 in words is "two hundred fifteen million, forty thousand, three hundred forty-three".