31043440523 has 2 divisors, whose sum is σ = 31043440524. Its totient is φ = 31043440522.

The previous prime is 31043440513. The next prime is 31043440577. The reversal of 31043440523 is 32504434013.

It is a weak prime.

It is an emirp because it is prime and its reverse (32504434013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31043440523 - 2⁴ = 31043440507 is a prime.

It is not a weakly prime, because it can be changed into another prime (31043440513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521720261 + 15521720262.

It is an arithmetic number, because the mean of its divisors is an integer number (15521720262).

Almost surely, 2^31043440523 is an apocalyptic number.

31043440523 is a deficient number, since it is larger than the sum of its proper divisors (1).

31043440523 is an equidigital number, since it uses as much as digits as its factorization.

31043440523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 31043440523 its reverse (32504434013), we get a palindrome (63547874536).

The spelling of 31043440523 in words is "thirty-one billion, forty-three million, four hundred forty thousand, five hundred twenty-three".