1311340415 has 64 divisors (see below), whose sum is σ = 2061020160. Its totient is φ = 777047040.

The previous prime is 1311340411. The next prime is 1311340417. The reversal of 1311340415 is 5140431131.

It is a happy number.

It is not a de Polignac number, because 1311340415 - 2² = 1311340411 is a prime.

It is a super-2 number, since 2×1311340415² = 3439227368024744450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311340411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 747179 + ... + 748931.

It is an arithmetic number, because the mean of its divisors is an integer number (32203440).

Almost surely, 2^1311340415 is an apocalyptic number.

1311340415 is a deficient number, since it is larger than the sum of its proper divisors (749679745).

1311340415 is a wasteful number, since it uses less digits than its factorization.

1311340415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1311340415 is about 36212.4345356674. The cubic root of 1311340415 is about 1094.5572503040.

Adding to 1311340415 its reverse (5140431131), we get a palindrome (6451771546).

The spelling of 1311340415 in words is "one billion, three hundred eleven million, three hundred forty thousand, four hundred fifteen".