311043 has 4 divisors (see below), whose sum is σ = 414728. Its totient is φ = 207360.

The previous prime is 311041. The next prime is 311099. The reversal of 311043 is 340113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340113 = 3 ⋅113371.

It is not a de Polignac number, because 311043 - 2¹ = 311041 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311041) 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, 51838 + ... + 51843.

It is an arithmetic number, because the mean of its divisors is an integer number (103682).

2³¹¹⁰⁴³ is an apocalyptic number.

311043 is a deficient number, since it is larger than the sum of its proper divisors (103685).

311043 is a wasteful number, since it uses less digits than its factorization.

311043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103684.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 311043 is about 557.7122914192. The cubic root of 311043 is about 67.7548119111.

Adding to 311043 its reverse (340113), we get a palindrome (651156).

The spelling of 311043 in words is "three hundred eleven thousand, forty-three", and thus it is an iban number.