1311523338 has 16 divisors (see below), whose sum is σ = 2654650656. Its totient is φ = 431907120.

The previous prime is 1311523321. The next prime is 1311523351. The reversal of 1311523338 is 8333251131.

It is a super-2 number, since 2×1311523338² = 3440186932237324488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1316293 + ... + 1317288.

It is an arithmetic number, because the mean of its divisors is an integer number (165915666).

Almost surely, 2^1311523338 is an apocalyptic number.

1311523338 is an abundant number, since it is smaller than the sum of its proper divisors (1343127318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311523338 is a wasteful number, since it uses less digits than its factorization.

1311523338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2633669.

The product of its digits is 6480, while the sum is 30.

The square root of 1311523338 is about 36214.9601408037. The cubic root of 1311523338 is about 1094.6081423491.

Adding to 1311523338 its reverse (8333251131), we get a palindrome (9644774469).

The spelling of 1311523338 in words is "one billion, three hundred eleven million, five hundred twenty-three thousand, three hundred thirty-eight".