31144441 has 2 divisors, whose sum is σ = 31144442. Its totient is φ = 31144440.

The previous prime is 31144423. The next prime is 31144453. The reversal of 31144441 is 14444113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30470400 + 674041 = 5520^2 + 821^2 .

It is an emirp because it is prime and its reverse (14444113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31144441 - 2⁷ = 31144313 is a prime.

It is equal to p_1924312 and since 31144441 and 1924312 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31144471) 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, 15572220 + 15572221.

It is an arithmetic number, because the mean of its divisors is an integer number (15572221).

Almost surely, 2^31144441 is an apocalyptic number.

It is an amenable number.

31144441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144441 is an equidigital number, since it uses as much as digits as its factorization.

31144441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

The square root of 31144441 is about 5580.7204732006. The cubic root of 31144441 is about 314.6252063769.

Adding to 31144441 its reverse (14444113), we get a palindrome (45588554).

The spelling of 31144441 in words is "thirty-one million, one hundred forty-four thousand, four hundred forty-one".