31440523355311 has 4 divisors (see below), whose sum is σ = 35932026691792. Its totient is φ = 26949020018832.

The previous prime is 31440523355237. The next prime is 31440523355377. The reversal of 31440523355311 is 11355332504413.

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 31440523355311 - 2¹¹ = 31440523353263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440523355711) 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 3 ways as a sum of consecutive naturals, for example, 2245751668230 + ... + 2245751668243.

It is an arithmetic number, because the mean of its divisors is an integer number (8983006672948).

Almost surely, 2^{31440523355311} is an apocalyptic number.

31440523355311 is a deficient number, since it is larger than the sum of its proper divisors (4491503336481).

31440523355311 is an equidigital number, since it uses as much as digits as its factorization.

31440523355311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491503336480.

The product of its (nonzero) digits is 324000, while the sum is 40.

Adding to 31440523355311 its reverse (11355332504413), we get a palindrome (42795855859724).

The spelling of 31440523355311 in words is "thirty-one trillion, four hundred forty billion, five hundred twenty-three million, three hundred fifty-five thousand, three hundred eleven".