11161511 has 2 divisors, whose sum is σ = 11161512. Its totient is φ = 11161510.

The previous prime is 11161489. The next prime is 11161517. The reversal of 11161511 is 11516111.

It is a strong prime.

It is an emirp because it is prime and its reverse (11516111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11161511 - 2¹⁸ = 10899367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11161511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11161517) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5580755 + 5580756.

It is an arithmetic number, because the mean of its divisors is an integer number (5580756).

Almost surely, 2^11161511 is an apocalyptic number.

11161511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11161511 is an equidigital number, since it uses as much as digits as its factorization.

11161511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30, while the sum is 17.

The square root of 11161511 is about 3340.8847630530. The cubic root of 11161511 is about 223.4812013010.

Adding to 11161511 its reverse (11516111), we get a palindrome (22677622).

The spelling of 11161511 in words is "eleven million, one hundred sixty-one thousand, five hundred eleven".