311422403 has 2 divisors, whose sum is σ = 311422404. Its totient is φ = 311422402.

The previous prime is 311422393. The next prime is 311422409. The reversal of 311422403 is 304224113.

It is a strong prime.

It is an emirp because it is prime and its reverse (304224113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311422403 - 2¹⁶ = 311356867 is a prime.

It is not a weakly prime, because it can be changed into another prime (311422409) 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, 155711201 + 155711202.

It is an arithmetic number, because the mean of its divisors is an integer number (155711202).

Almost surely, 2^311422403 is an apocalyptic number.

311422403 is a deficient number, since it is larger than the sum of its proper divisors (1).

311422403 is an equidigital number, since it uses as much as digits as its factorization.

311422403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 311422403 is about 17647.1641631170. The cubic root of 311422403 is about 677.8234929769.

Adding to 311422403 its reverse (304224113), we get a palindrome (615646516).

The spelling of 311422403 in words is "three hundred eleven million, four hundred twenty-two thousand, four hundred three".