1323131131 has 32 divisors (see below), whose sum is σ = 1652797440. Its totient is φ = 1033344000.

The previous prime is 1323131129. The next prime is 1323131149. The reversal of 1323131131 is 1311313231.

It is a cyclic number.

It is not a de Polignac number, because 1323131131 - 2¹ = 1323131129 is a prime.

It is a super-2 number, since 2×1323131131² = 3501351979642678322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1323131099 and 1323131108.

It is not an unprimeable number, because it can be changed into a prime (1323131111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 677206 + ... + 679156.

It is an arithmetic number, because the mean of its divisors is an integer number (51649920).

Almost surely, 2^1323131131 is an apocalyptic number.

1323131131 is a deficient number, since it is larger than the sum of its proper divisors (329666309).

1323131131 is a wasteful number, since it uses less digits than its factorization.

1323131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155.

The product of its digits is 162, while the sum is 19.

The square root of 1323131131 is about 36374.8694980477. The cubic root of 1323131131 is about 1097.8279815303.

Adding to 1323131131 its reverse (1311313231), we get a palindrome (2634444362).

The spelling of 1323131131 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, one hundred thirty-one".