311312203 has 2 divisors, whose sum is σ = 311312204. Its totient is φ = 311312202.

The previous prime is 311312201. The next prime is 311312227. The reversal of 311312203 is 302213113.

It is a weak prime.

It is an emirp because it is prime and its reverse (302213113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311312203 - 2¹ = 311312201 is a prime.

Together with 311312201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (311312201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155656101 + 155656102.

It is an arithmetic number, because the mean of its divisors is an integer number (155656102).

Almost surely, 2^311312203 is an apocalyptic number.

311312203 is a deficient number, since it is larger than the sum of its proper divisors (1).

311312203 is an equidigital number, since it uses as much as digits as its factorization.

311312203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 311312203 is about 17644.0415721569. The cubic root of 311312203 is about 677.7435319544.

Adding to 311312203 its reverse (302213113), we get a palindrome (613525316).

The spelling of 311312203 in words is "three hundred eleven million, three hundred twelve thousand, two hundred three".