11521513 has 2 divisors, whose sum is σ = 11521514. Its totient is φ = 11521512.

The previous prime is 11521501. The next prime is 11521519. The reversal of 11521513 is 31512511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7884864 + 3636649 = 2808^2 + 1907^2 .

It is a cyclic number.

It is not a de Polignac number, because 11521513 - 2¹³ = 11513321 is a prime.

It is not a weakly prime, because it can be changed into another prime (11521519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5760756 + 5760757.

It is an arithmetic number, because the mean of its divisors is an integer number (5760757).

Almost surely, 2^11521513 is an apocalyptic number.

It is an amenable number.

11521513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11521513 is an equidigital number, since it uses as much as digits as its factorization.

11521513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150, while the sum is 19.

The square root of 11521513 is about 3394.3354283276. The cubic root of 11521513 is about 225.8585339119.

The spelling of 11521513 in words is "eleven million, five hundred twenty-one thousand, five hundred thirteen".