311223083 has 2 divisors, whose sum is σ = 311223084. Its totient is φ = 311223082.

The previous prime is 311223079. The next prime is 311223149. The reversal of 311223083 is 380322113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311223083 - 2² = 311223079 is a prime.

It is not a weakly prime, because it can be changed into another prime (311223383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155611541 + 155611542.

It is an arithmetic number, because the mean of its divisors is an integer number (155611542).

Almost surely, 2^311223083 is an apocalyptic number.

311223083 is a deficient number, since it is larger than the sum of its proper divisors (1).

311223083 is an equidigital number, since it uses as much as digits as its factorization.

311223083 is an evil number, because the sum of its binary digits is even.

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

The square root of 311223083 is about 17641.5158929158. The cubic root of 311223083 is about 677.6788527593.

Adding to 311223083 its reverse (380322113), we get a palindrome (691545196).

The spelling of 311223083 in words is "three hundred eleven million, two hundred twenty-three thousand, eighty-three".