31303111289 has 2 divisors, whose sum is σ = 31303111290. Its totient is φ = 31303111288.

The previous prime is 31303111283. The next prime is 31303111303. The reversal of 31303111289 is 98211130313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29469558889 + 1833552400 = 171667^2 + 42820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31303111289 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 (31303111283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651555644 + 15651555645.

It is an arithmetic number, because the mean of its divisors is an integer number (15651555645).

Almost surely, 2^31303111289 is an apocalyptic number.

It is an amenable number.

31303111289 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303111289 is an equidigital number, since it uses as much as digits as its factorization.

31303111289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 31303111289 in words is "thirty-one billion, three hundred three million, one hundred eleven thousand, two hundred eighty-nine".