311221314 has 12 divisors (see below), whose sum is σ = 674312886. Its totient is φ = 103740432.

The previous prime is 311221289. The next prime is 311221331. The reversal of 311221314 is 413122113.

It can be written as a sum of positive squares in only one way, i.e., 244390689 + 66830625 = 15633^2 + 8175^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17290073 = 311221314 / (3 + 1 + 1 + 2 + 2 + 1 + 3 + 1 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8645019 + ... + 8645054.

Almost surely, 2^311221314 is an apocalyptic number.

311221314 is an abundant number, since it is smaller than the sum of its proper divisors (363091572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311221314 is a wasteful number, since it uses less digits than its factorization.

311221314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17290081 (or 17290078 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 311221314 is about 17641.4657554297. The cubic root of 311221314 is about 677.6775687755.

Adding to 311221314 its reverse (413122113), we get a palindrome (724343427).

The spelling of 311221314 in words is "three hundred eleven million, two hundred twenty-one thousand, three hundred fourteen".