31331434241 has 2 divisors, whose sum is σ = 31331434242. Its totient is φ = 31331434240.

The previous prime is 31331434193. The next prime is 31331434271. The reversal of 31331434241 is 14243413313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31210522225 + 120912016 = 176665^2 + 10996^2 .

It is an emirp because it is prime and its reverse (14243413313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31331434241 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31331434271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665717120 + 15665717121.

It is an arithmetic number, because the mean of its divisors is an integer number (15665717121).

Almost surely, 2^31331434241 is an apocalyptic number.

It is an amenable number.

31331434241 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331434241 is an equidigital number, since it uses as much as digits as its factorization.

31331434241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

Adding to 31331434241 its reverse (14243413313), we get a palindrome (45574847554).

The spelling of 31331434241 in words is "thirty-one billion, three hundred thirty-one million, four hundred thirty-four thousand, two hundred forty-one".