311061 has 4 divisors (see below), whose sum is σ = 414752. Its totient is φ = 207372.

The previous prime is 311041. The next prime is 311099. The reversal of 311061 is 160113.

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 311061 - 2⁶ = 310997 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51841 + ... + 51846.

It is an arithmetic number, because the mean of its divisors is an integer number (103688).

2³¹¹⁰⁶¹ is an apocalyptic number.

It is an amenable number.

311061 is a deficient number, since it is larger than the sum of its proper divisors (103691).

311061 is a wasteful number, since it uses less digits than its factorization.

311061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103690.

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

The square root of 311061 is about 557.7284285385. The cubic root of 311061 is about 67.7561188720.

Adding to 311061 its reverse (160113), we get a palindrome (471174).

The spelling of 311061 in words is "three hundred eleven thousand, sixty-one".