1311523357 has 8 divisors (see below), whose sum is σ = 1315883520. Its totient is φ = 1307171040.

The previous prime is 1311523351. The next prime is 1311523373. The reversal of 1311523357 is 7533251131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311523357 - 2⁷ = 1311523229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311523351) 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 in 7 ways as a sum of consecutive naturals, for example, 584644 + ... + 586882.

It is an arithmetic number, because the mean of its divisors is an integer number (164485440).

Almost surely, 2^1311523357 is an apocalyptic number.

It is an amenable number.

1311523357 is a deficient number, since it is larger than the sum of its proper divisors (4360163).

1311523357 is a wasteful number, since it uses less digits than its factorization.

1311523357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923.

The product of its digits is 9450, while the sum is 31.

The square root of 1311523357 is about 36214.9604031262. The cubic root of 1311523357 is about 1094.6081476350.

Adding to 1311523357 its reverse (7533251131), we get a palindrome (8844774488).

The spelling of 1311523357 in words is "one billion, three hundred eleven million, five hundred twenty-three thousand, three hundred fifty-seven".