311332223 has 2 divisors, whose sum is σ = 311332224. Its totient is φ = 311332222.

The previous prime is 311332213. The next prime is 311332243. The reversal of 311332223 is 322233113.

It is an a-pointer prime, because the next prime (311332243) can be obtained adding 311332223 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311332223 - 2⁴ = 311332207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311332195 and 311332204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311332213) 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, 155666111 + 155666112.

It is an arithmetic number, because the mean of its divisors is an integer number (155666112).

Almost surely, 2^311332223 is an apocalyptic number.

311332223 is a deficient number, since it is larger than the sum of its proper divisors (1).

311332223 is an equidigital number, since it uses as much as digits as its factorization.

311332223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 20.

The square root of 311332223 is about 17644.6088933702. The cubic root of 311332223 is about 677.7580598512.

Adding to 311332223 its reverse (322233113), we get a palindrome (633565336).

The spelling of 311332223 in words is "three hundred eleven million, three hundred thirty-two thousand, two hundred twenty-three".