11515161 has 16 divisors (see below), whose sum is σ = 17730944. Its totient is φ = 6511104.

The previous prime is 11515139. The next prime is 11515181. The reversal of 11515161 is 16151511.

It is a happy number.

It is not a de Polignac number, because 11515161 - 2⁵ = 11515129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11515181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790 + ... + 4863.

It is an arithmetic number, because the mean of its divisors is an integer number (1108184).

Almost surely, 2^11515161 is an apocalyptic number.

It is an amenable number.

11515161 is a deficient number, since it is larger than the sum of its proper divisors (6215783).

11515161 is an equidigital number, since it uses as much as digits as its factorization.

11515161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5760.

The product of its digits is 150, while the sum is 21.

The square root of 11515161 is about 3393.3996227972. The cubic root of 11515161 is about 225.8170197711.

Adding to 11515161 its reverse (16151511), we get a palindrome (27666672).

The spelling of 11515161 in words is "eleven million, five hundred fifteen thousand, one hundred sixty-one".