31144111 has 2 divisors, whose sum is σ = 31144112. Its totient is φ = 31144110.

The previous prime is 31144109. The next prime is 31144147. The reversal of 31144111 is 11144113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31144111 - 2¹ = 31144109 is a prime.

Together with 31144109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31144171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572055 + 15572056.

It is an arithmetic number, because the mean of its divisors is an integer number (15572056).

Almost surely, 2^31144111 is an apocalyptic number.

31144111 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144111 is an equidigital number, since it uses as much as digits as its factorization.

31144111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 16.

The square root of 31144111 is about 5580.6909070473. The cubic root of 31144111 is about 314.6240951387.

Adding to 31144111 its reverse (11144113), we get a palindrome (42288224).

It can be divided in two parts, 3114 and 4111, that added together give a square (7225 = 85²).

The spelling of 31144111 in words is "thirty-one million, one hundred forty-four thousand, one hundred eleven".