311057 has 4 divisors (see below), whose sum is σ = 316980. Its totient is φ = 305136.

The previous prime is 311041. The next prime is 311099. The reversal of 311057 is 750113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 192721 = 344^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 311057 - 2⁴ = 311041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311027) 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, 2882 + ... + 2987.

It is an arithmetic number, because the mean of its divisors is an integer number (79245).

2³¹¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

311057 is a deficient number, since it is larger than the sum of its proper divisors (5923).

311057 is an equidigital number, since it uses as much as digits as its factorization.

311057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922.

The product of its (nonzero) digits is 105, while the sum is 17.

The square root of 311057 is about 557.7248425523. The cubic root of 311057 is about 67.7558284406.

The spelling of 311057 in words is "three hundred eleven thousand, fifty-seven".