311671 has 4 divisors (see below), whose sum is σ = 313272. Its totient is φ = 310072.

The previous prime is 311659. The next prime is 311677. The reversal of 311671 is 176113.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311671 - 2¹¹ = 309623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460 + ... + 913.

It is an arithmetic number, because the mean of its divisors is an integer number (78318).

2³¹¹⁶⁷¹ is an apocalyptic number.

311671 is a deficient number, since it is larger than the sum of its proper divisors (1601).

311671 is a wasteful number, since it uses less digits than its factorization.

311671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its digits is 126, while the sum is 19.

The square root of 311671 is about 558.2750218306. The cubic root of 311671 is about 67.8003805491.

Adding to 311671 its reverse (176113), we get a palindrome (487784).

The spelling of 311671 in words is "three hundred eleven thousand, six hundred seventy-one".