311320142 has 16 divisors (see below), whose sum is σ = 539196000. Its totient is φ = 132046848.

The previous prime is 311320103. The next prime is 311320159. The reversal of 311320142 is 241023113.

It is a self number, because there is not a number n which added to its sum of digits gives 311320142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113267 + ... + 115982.

It is an arithmetic number, because the mean of its divisors is an integer number (33699750).

Almost surely, 2^311320142 is an apocalyptic number.

311320142 is a deficient number, since it is larger than the sum of its proper divisors (227875858).

311320142 is a wasteful number, since it uses less digits than its factorization.

311320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229355.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 311320142 is about 17644.2665475219. The cubic root of 311320142 is about 677.7492931165.

Adding to 311320142 its reverse (241023113), we get a palindrome (552343255).

The spelling of 311320142 in words is "three hundred eleven million, three hundred twenty thousand, one hundred forty-two".