1311340144 has 20 divisors (see below), whose sum is σ = 2541699424. Its totient is φ = 655417728.

The previous prime is 1311340141. The next prime is 1311340159. The reversal of 1311340144 is 4410431131.

It is a happy number.

It is a super-2 number, since 2×1311340144² = 3439225946531881472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311340141) 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, 31369 + ... + 60055.

Almost surely, 2^1311340144 is an apocalyptic number.

It is an amenable number.

1311340144 is a deficient number, since it is larger than the sum of its proper divisors (1230359280).

1311340144 is a wasteful number, since it uses less digits than its factorization.

1311340144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31552 (or 31546 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1311340144 is about 36212.4307938586. The cubic root of 1311340144 is about 1094.5571749040.

Adding to 1311340144 its reverse (4410431131), we get a palindrome (5721771275).

The spelling of 1311340144 in words is "one billion, three hundred eleven million, three hundred forty thousand, one hundred forty-four".