31144423 has 2 divisors, whose sum is σ = 31144424. Its totient is φ = 31144422.

The previous prime is 31144397. The next prime is 31144441. The reversal of 31144423 is 32444113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31144423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31144394 and 31144403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31144453) 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, 15572211 + 15572212.

It is an arithmetic number, because the mean of its divisors is an integer number (15572212).

Almost surely, 2^31144423 is an apocalyptic number.

31144423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144423 is an equidigital number, since it uses as much as digits as its factorization.

31144423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 22.

The square root of 31144423 is about 5580.7188605053. The cubic root of 31144423 is about 314.6251457641.

Adding to 31144423 its reverse (32444113), we get a palindrome (63588536).

The spelling of 31144423 in words is "thirty-one million, one hundred forty-four thousand, four hundred twenty-three".