311242144 has 24 divisors (see below), whose sum is σ = 615448260. Its totient is φ = 154937856.

The previous prime is 311242117. The next prime is 311242147. The reversal of 311242144 is 441242113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 309337744 + 1904400 = 17588^2 + 1380^2 .

It is not an unprimeable number, because it can be changed into a prime (311242147) 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, 13909 + ... + 28564.

Almost surely, 2^311242144 is an apocalyptic number.

It is an amenable number.

311242144 is a deficient number, since it is larger than the sum of its proper divisors (304206116).

311242144 is a wasteful number, since it uses less digits than its factorization.

311242144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42712 (or 42704 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 311242144 is about 17642.0561159974. The cubic root of 311242144 is about 677.6926873939.

Adding to 311242144 its reverse (441242113), we get a palindrome (752484257).

The spelling of 311242144 in words is "three hundred eleven million, two hundred forty-two thousand, one hundred forty-four".