31345441 has 2 divisors, whose sum is σ = 31345442. Its totient is φ = 31345440.

The previous prime is 31345439. The next prime is 31345471. The reversal of 31345441 is 14454313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 3625216 = 5265^2 + 1904^2 .

It is a cyclic number.

It is not a de Polignac number, because 31345441 - 2¹ = 31345439 is a prime.

Together with 31345439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31345471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672720 + 15672721.

It is an arithmetic number, because the mean of its divisors is an integer number (15672721).

Almost surely, 2^31345441 is an apocalyptic number.

It is an amenable number.

31345441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345441 is an equidigital number, since it uses as much as digits as its factorization.

31345441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 31345441 is about 5598.6999383786. The cubic root of 31345441 is about 315.3005982474.

Adding to 31345441 its reverse (14454313), we get a palindrome (45799754).

It can be divided in two parts, 313 and 45441, that added together give a palindrome (45754).

The spelling of 31345441 in words is "thirty-one million, three hundred forty-five thousand, four hundred forty-one".