215440143405 has 8 divisors (see below), whose sum is σ = 344704229472. Its totient is φ = 114901409808.

The previous prime is 215440143377. The next prime is 215440143419. The reversal of 215440143405 is 504341044512.

It is a happy number.

215440143405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215440143405 - 2⁶ = 215440143341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7181338099 + ... + 7181338128.

It is an arithmetic number, because the mean of its divisors is an integer number (43088028684).

Almost surely, 2^215440143405 is an apocalyptic number.

It is an amenable number.

215440143405 is a deficient number, since it is larger than the sum of its proper divisors (129264086067).

215440143405 is a wasteful number, since it uses less digits than its factorization.

215440143405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14362676235.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 215440143405 its reverse (504341044512), we get a palindrome (719781187917).

The spelling of 215440143405 in words is "two hundred fifteen billion, four hundred forty million, one hundred forty-three thousand, four hundred five".