11115560 has 16 divisors (see below), whose sum is σ = 25010100. Its totient is φ = 4446208.

The previous prime is 11115557. The next prime is 11115583. The reversal of 11115560 is 6551111.

It can be written as a sum of positive squares in 2 ways, for example, as 11115556 + 4 = 3334^2 + 2^2 .

It is a super-2 number, since 2×11115560² = 247111348227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138905 + ... + 138984.

Almost surely, 2^11115560 is an apocalyptic number.

11115560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11115560 is an abundant number, since it is smaller than the sum of its proper divisors (13894540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11115560 is a wasteful number, since it uses less digits than its factorization.

11115560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277900 (or 277896 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 20.

The square root of 11115560 is about 3334.0005998800. Note that the first 3 decimals coincide. The cubic root of 11115560 is about 223.1740950481.

Adding to 11115560 its reverse (6551111), we get a palindrome (17666671).

The spelling of 11115560 in words is "eleven million, one hundred fifteen thousand, five hundred sixty".