31405044243 has 16 divisors (see below), whose sum is σ = 42010001280. Its totient is φ = 20868443904.

The previous prime is 31405044239. The next prime is 31405044259. The reversal of 31405044243 is 34244050413.

It is not a de Polignac number, because 31405044243 - 2² = 31405044239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31405044243.

It is not an unprimeable number, because it can be changed into a prime (31405049243) 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, 3260088 + ... + 3269706.

It is an arithmetic number, because the mean of its divisors is an integer number (2625625080).

Almost surely, 2^31405044243 is an apocalyptic number.

31405044243 is a deficient number, since it is larger than the sum of its proper divisors (10604957037).

31405044243 is a wasteful number, since it uses less digits than its factorization.

31405044243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13058.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 31405044243 its reverse (34244050413), we get a palindrome (65649094656).

The spelling of 31405044243 in words is "thirty-one billion, four hundred five million, forty-four thousand, two hundred forty-three".