31423147111 has 2 divisors, whose sum is σ = 31423147112. Its totient is φ = 31423147110.

The previous prime is 31423147097. The next prime is 31423147121. The reversal of 31423147111 is 11174132413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31423147111 - 2⁷ = 31423146983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31423147111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31423147121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711573555 + 15711573556.

It is an arithmetic number, because the mean of its divisors is an integer number (15711573556).

Almost surely, 2^31423147111 is an apocalyptic number.

31423147111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31423147111 is an equidigital number, since it uses as much as digits as its factorization.

31423147111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

Adding to 31423147111 its reverse (11174132413), we get a palindrome (42597279524).

The spelling of 31423147111 in words is "thirty-one billion, four hundred twenty-three million, one hundred forty-seven thousand, one hundred eleven".