215340143 has 4 divisors (see below), whose sum is σ = 217430928. Its totient is φ = 213249360.

The previous prime is 215340137. The next prime is 215340161. The reversal of 215340143 is 341043512.

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 215340143 - 2⁴ = 215340127 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 (215346143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045238 + ... + 1045443.

It is an arithmetic number, because the mean of its divisors is an integer number (54357732).

Almost surely, 2^215340143 is an apocalyptic number.

215340143 is a deficient number, since it is larger than the sum of its proper divisors (2090785).

215340143 is a wasteful number, since it uses less digits than its factorization.

215340143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2090784.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 215340143 is about 14674.4724947781. The cubic root of 215340143 is about 599.3883980799.

Adding to 215340143 its reverse (341043512), we get a palindrome (556383655).

The spelling of 215340143 in words is "two hundred fifteen million, three hundred forty thousand, one hundred forty-three".