31301120243 has 2 divisors, whose sum is σ = 31301120244. Its totient is φ = 31301120242.

The previous prime is 31301120231. The next prime is 31301120281. The reversal of 31301120243 is 34202110313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301120243 is a prime.

It is not a weakly prime, because it can be changed into another prime (31301120293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650560121 + 15650560122.

It is an arithmetic number, because the mean of its divisors is an integer number (15650560122).

Almost surely, 2^31301120243 is an apocalyptic number.

31301120243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301120243 is an equidigital number, since it uses as much as digits as its factorization.

31301120243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31301120243 its reverse (34202110313), we get a palindrome (65503230556).

The spelling of 31301120243 in words is "thirty-one billion, three hundred one million, one hundred twenty thousand, two hundred forty-three".