31201243273 has 2 divisors, whose sum is σ = 31201243274. Its totient is φ = 31201243272.

The previous prime is 31201243217. The next prime is 31201243277. The reversal of 31201243273 is 37234210213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19821260944 + 11379982329 = 140788^2 + 106677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201243273 is a prime.

It is not a weakly prime, because it can be changed into another prime (31201243277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15600621636 + 15600621637.

It is an arithmetic number, because the mean of its divisors is an integer number (15600621637).

Almost surely, 2^31201243273 is an apocalyptic number.

It is an amenable number.

31201243273 is a deficient number, since it is larger than the sum of its proper divisors (1).

31201243273 is an equidigital number, since it uses as much as digits as its factorization.

31201243273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 31201243273 its reverse (37234210213), we get a palindrome (68435453486).

The spelling of 31201243273 in words is "thirty-one billion, two hundred one million, two hundred forty-three thousand, two hundred seventy-three".