31112140243 has 2 divisors, whose sum is σ = 31112140244. Its totient is φ = 31112140242.

The previous prime is 31112140223. The next prime is 31112140259. The reversal of 31112140243 is 34204121113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112140243 is a prime.

It is not a weakly prime, because it can be changed into another prime (31112140223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556070121 + 15556070122.

It is an arithmetic number, because the mean of its divisors is an integer number (15556070122).

Almost surely, 2^31112140243 is an apocalyptic number.

31112140243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112140243 is an equidigital number, since it uses as much as digits as its factorization.

31112140243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31112140243 its reverse (34204121113), we get a palindrome (65316261356).

The spelling of 31112140243 in words is "thirty-one billion, one hundred twelve million, one hundred forty thousand, two hundred forty-three".