311601 has 4 divisors (see below), whose sum is σ = 415472. Its totient is φ = 207732.

The previous prime is 311569. The next prime is 311603. The reversal of 311601 is 106113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 311601 - 2⁵ = 311569 is a prime.

It is a D-number.

It is a Duffinian number.

311601 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (311603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51931 + ... + 51936.

It is an arithmetic number, because the mean of its divisors is an integer number (103868).

2³¹¹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

311601 is a deficient number, since it is larger than the sum of its proper divisors (103871).

311601 is a wasteful number, since it uses less digits than its factorization.

311601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103870.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 311601 is about 558.2123251954. The cubic root of 311601 is about 67.7953042753.

Adding to 311601 its reverse (106113), we get a palindrome (417714).

The spelling of 311601 in words is "three hundred eleven thousand, six hundred one".