311158 has 4 divisors (see below), whose sum is σ = 466740. Its totient is φ = 155578.

The previous prime is 311153. The next prime is 311173. The reversal of 311158 is 851113.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77788 + ... + 77791.

It is an arithmetic number, because the mean of its divisors is an integer number (116685).

2³¹¹¹⁵⁸ is an apocalyptic number.

311158 is a deficient number, since it is larger than the sum of its proper divisors (155582).

311158 is a wasteful number, since it uses less digits than its factorization.

311158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155581.

The product of its digits is 120, while the sum is 19.

The square root of 311158 is about 557.8153816452. The cubic root of 311158 is about 67.7631610711.

The spelling of 311158 in words is "three hundred eleven thousand, one hundred fifty-eight".