215205442045 has 8 divisors (see below), whose sum is σ = 281723487840. Its totient is φ = 156513048720.

The previous prime is 215205442043. The next prime is 215205442057. The reversal of 215205442045 is 540244502512.

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

It is not a de Polignac number, because 215205442045 - 2¹ = 215205442043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215205442045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215205442043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1956413055 + ... + 1956413164.

It is an arithmetic number, because the mean of its divisors is an integer number (35215435980).

Almost surely, 2^215205442045 is an apocalyptic number.

It is an amenable number.

215205442045 is a deficient number, since it is larger than the sum of its proper divisors (66518045795).

215205442045 is a wasteful number, since it uses less digits than its factorization.

215205442045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912826235.

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 215205442045 its reverse (540244502512), we get a palindrome (755449944557).

The spelling of 215205442045 in words is "two hundred fifteen billion, two hundred five million, four hundred forty-two thousand, forty-five".