11513321 has 2 divisors, whose sum is σ = 11513322. Its totient is φ = 11513320.

The previous prime is 11513311. The next prime is 11513329. The reversal of 11513321 is 12331511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11323225 + 190096 = 3365^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 11513321 - 2²² = 7319017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11513321.

It is not a weakly prime, because it can be changed into another prime (11513329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5756660 + 5756661.

It is an arithmetic number, because the mean of its divisors is an integer number (5756661).

Almost surely, 2^11513321 is an apocalyptic number.

It is an amenable number.

11513321 is a deficient number, since it is larger than the sum of its proper divisors (1).

11513321 is an equidigital number, since it uses as much as digits as its factorization.

11513321 is an evil number, because the sum of its binary digits is even.

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

The square root of 11513321 is about 3393.1284974195. The cubic root of 11513321 is about 225.8049914128.

Adding to 11513321 its reverse (12331511), we get a palindrome (23844832).

The spelling of 11513321 in words is "eleven million, five hundred thirteen thousand, three hundred twenty-one".