311603441 has 2 divisors, whose sum is σ = 311603442. Its totient is φ = 311603440.

The previous prime is 311603407. The next prime is 311603443. The reversal of 311603441 is 144306113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165894400 + 145709041 = 12880^2 + 12071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311603441 is a prime.

Together with 311603443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311603443) 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, 155801720 + 155801721.

It is an arithmetic number, because the mean of its divisors is an integer number (155801721).

Almost surely, 2^311603441 is an apocalyptic number.

It is an amenable number.

311603441 is a deficient number, since it is larger than the sum of its proper divisors (1).

311603441 is an equidigital number, since it uses as much as digits as its factorization.

311603441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 311603441 is about 17652.2927972544. The cubic root of 311603441 is about 677.9548130505.

Adding to 311603441 its reverse (144306113), we get a palindrome (455909554).

The spelling of 311603441 in words is "three hundred eleven million, six hundred three thousand, four hundred forty-one".