31112111447 has 2 divisors, whose sum is σ = 31112111448. Its totient is φ = 31112111446.

The previous prime is 31112111377. The next prime is 31112111453. The reversal of 31112111447 is 74411121113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112111447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31112111047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556055723 + 15556055724.

It is an arithmetic number, because the mean of its divisors is an integer number (15556055724).

Almost surely, 2^31112111447 is an apocalyptic number.

31112111447 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112111447 is an equidigital number, since it uses as much as digits as its factorization.

31112111447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The spelling of 31112111447 in words is "thirty-one billion, one hundred twelve million, one hundred eleven thousand, four hundred forty-seven".