115511011 has 8 divisors (see below), whose sum is σ = 144013824. Its totient is φ = 90008520.

The previous prime is 115510957. The next prime is 115511041. The reversal of 115511011 is 110115511.

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

It is not a de Polignac number, because 115511011 - 2⁷ = 115510883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115511041) 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, 749995 + ... + 750148.

It is an arithmetic number, because the mean of its divisors is an integer number (18001728).

Almost surely, 2^115511011 is an apocalyptic number.

115511011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115511011 is a deficient number, since it is larger than the sum of its proper divisors (28502813).

115511011 is a wasteful number, since it uses less digits than its factorization.

115511011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500161.

The product of its (nonzero) digits is 25, while the sum is 16.

The square root of 115511011 is about 10747.6048959757. The cubic root of 115511011 is about 487.0136438967.

Adding to 115511011 its reverse (110115511), we get a palindrome (225626522).

The spelling of 115511011 in words is "one hundred fifteen million, five hundred eleven thousand, eleven".