311216377 has 2 divisors, whose sum is σ = 311216378. Its totient is φ = 311216376.

The previous prime is 311216317. The next prime is 311216383. The reversal of 311216377 is 773612113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219899241 + 91317136 = 14829^2 + 9556^2 .

It is a cyclic number.

It is not a de Polignac number, because 311216377 - 2¹¹ = 311214329 is a prime.

It is a super-3 number, since 3×311216377³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (311216317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155608188 + 155608189.

It is an arithmetic number, because the mean of its divisors is an integer number (155608189).

Almost surely, 2^311216377 is an apocalyptic number.

It is an amenable number.

311216377 is a deficient number, since it is larger than the sum of its proper divisors (1).

311216377 is an equidigital number, since it uses as much as digits as its factorization.

311216377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5292, while the sum is 31.

The square root of 311216377 is about 17641.3258288599. The cubic root of 311216377 is about 677.6739853536.

The spelling of 311216377 in words is "three hundred eleven million, two hundred sixteen thousand, three hundred seventy-seven".