31043440123 has 2 divisors, whose sum is σ = 31043440124. Its totient is φ = 31043440122.

The previous prime is 31043440091. The next prime is 31043440201. The reversal of 31043440123 is 32104434013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31043440123 - 2⁵ = 31043440091 is a prime.

It is not a weakly prime, because it can be changed into another prime (31043440523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15521720061 + 15521720062.

It is an arithmetic number, because the mean of its divisors is an integer number (15521720062).

Almost surely, 2^31043440123 is an apocalyptic number.

31043440123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31043440123 is an equidigital number, since it uses as much as digits as its factorization.

31043440123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31043440123 its reverse (32104434013), we get a palindrome (63147874136).

The spelling of 31043440123 in words is "thirty-one billion, forty-three million, four hundred forty thousand, one hundred twenty-three".