405105240243 has 16 divisors (see below), whose sum is σ = 589469961600. Its totient is φ = 245424170880.

The previous prime is 405105240229. The next prime is 405105240263. The reversal of 405105240243 is 342042501504.

It is not a de Polignac number, because 405105240243 - 2¹² = 405105236147 is a prime.

It is a super-2 number, since 2×405105240243² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 405105240243.

It is not an unprimeable number, because it can be changed into a prime (405105240203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2266513 + ... + 2438706.

It is an arithmetic number, because the mean of its divisors is an integer number (36841872600).

Almost surely, 2^405105240243 is an apocalyptic number.

405105240243 is a deficient number, since it is larger than the sum of its proper divisors (184364721357).

405105240243 is a wasteful number, since it uses less digits than its factorization.

405105240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4707842.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 405105240243 its reverse (342042501504), we get a palindrome (747147741747).

The spelling of 405105240243 in words is "four hundred five billion, one hundred five million, two hundred forty thousand, two hundred forty-three".