12311513 has 2 divisors, whose sum is σ = 12311514. Its totient is φ = 12311512.

The previous prime is 12311503. The next prime is 12311539. The reversal of 12311513 is 31511321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 4313929 = 2828^2 + 2077^2 .

It is an emirp because it is prime and its reverse (31511321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12311513 - 2¹⁰ = 12310489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12311491 and 12311500.

It is not a weakly prime, because it can be changed into another prime (12311503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155756 + 6155757.

It is an arithmetic number, because the mean of its divisors is an integer number (6155757).

Almost surely, 2^12311513 is an apocalyptic number.

It is an amenable number.

12311513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311513 is an equidigital number, since it uses as much as digits as its factorization.

12311513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90, while the sum is 17.

The square root of 12311513 is about 3508.7765674092. The cubic root of 12311513 is about 230.9070232945.

Adding to 12311513 its reverse (31511321), we get a palindrome (43822834).

It can be divided in two parts, 1231 and 1513, that added together give a cube (2744 = 14³).

The spelling of 12311513 in words is "twelve million, three hundred eleven thousand, five hundred thirteen".