11115161 has 8 divisors (see below), whose sum is σ = 11822184. Its totient is φ = 10414080.

The previous prime is 11115131. The next prime is 11115163. The reversal of 11115161 is 16151111.

11115161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7946761 + 3168400 = 2819^2 + 1780^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11115161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11115163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2741 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (1477773).

Almost surely, 2^11115161 is an apocalyptic number.

It is an amenable number.

11115161 is a deficient number, since it is larger than the sum of its proper divisors (707023).

11115161 is a wasteful number, since it uses less digits than its factorization.

11115161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971.

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

The square root of 11115161 is about 3333.9407613214. The cubic root of 11115161 is about 223.1714246915.

Adding to 11115161 its reverse (16151111), we get a palindrome (27266272).

The spelling of 11115161 in words is "eleven million, one hundred fifteen thousand, one hundred sixty-one".